Strange issue with Lync 2013 Front end pool and UC Endpoints.

I have two servers in a Lync Pool.
S1 and S2. I also have an ACD server that has Trusted endpoints within Lync.
With both servers running, if a call is answered by S2 there are a bunch of weird delays in transfers. IF I shut down S2, everything works right. If I just run S2, the endpoints just ring forever and never pick up.
Additionally, with just the S1 server running, in and out calls are fine. With just the S2 server, outbound is delays and no inbound work.
It seems like there is something wrong with the S2 server, but what could it be?
Alex.

Hi,
Agree with Edwin.
Did you receive any error message from FE S2 when the issue happen?
Please double check the network status between FE S2 and ACD Server, on Lync Server Control Panel, check if FE S2 replication status normally.
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

Similar Messages

Unable to search GAL on Lync 2013 Front End Pool through Lync 2013 client

I'm in the beginning of a 2010 to 2013 migration and I'm currently testing co-existence functionality between pools. I've noticed that users cannot search the GAL from their Lync client after being moved to the 2013 pool.
When trying to access the internal URL https://fepool13.domain.com/abs/handler the user is prompted to login and after three failed attempts, receives "401 - Unauthorized: Access is denied due to invalid credentials. You do not have permission
to view this directory or page using the credentials that you supplied".
Searching withing a Lync 2010 or Lync 2013 client returns no results, but there are no errors as well as nothing in the event logs or tracing folder regarding not being able to search.
The 2010 pool has been in production for a few years now and when accessing its internal ABS URL https://fepool10.domain.com/abs/handler the user is granted access after a successful login.
In the IIS logs there are slightly more detailed 401 error codes, but I’m not sure what to make of them.
The rtcab database appears to have user information and all three front end servers appear to be syncing with active directory. I say the rtcab database appears to have user info because the AbUserEntry table is filled with User ID'd, GUID's and a
bunch of other stuff.
The authentication on 2013 front end servers “internal lync website/abs/handler” is set to 1. Negotiate, 2. Ntlm - which is the same as the 2010 front end servers.
Any ideas?

Hi,
Which step did you do among migration from Lync Server 2010 to Lync Server 2013?
Did you already move CMS from Lync Server 2010 to Lync Server 2013?
Please create a new Lync account on Lync Server 2013 pool and test the issue again.
Please check if User Replication has completed with the help of the link below:
http://technet.microsoft.com/en-us/library/jj204680.aspx
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

Lync Server 2013 Front End Pool Mediation Service only works on one node

Hello, I'm currently experiencing an interesting issue with a Lync 2013 Front End Pool implementation on a customer, and I don't know if this is by design or am I missing something.
We implemented 3 Enterprise Front End Servers in a Pool with a hardware load balancer and we have them configured also as a mediation Pool.
We have a SIP trunk to an Avaya PBX which was perfectly working before on a Lync 2010 Implementation that we migrated to these new 2013 Front End Pools.
Now the SIP traffic is only working when configured directly to one node of the pool. If we configure it to any other node the calls fail. We also tried configuring the HLB for port 5060 for the pool and pointed the PBX to that IP but the calls also fail.
Searching around I read something about that the PBX has to be Lync certified in order to use DNS load balancing to send SIP traffic to the mediation pool, however, I don't think DNS load balancing will work because the other nodes doesn't connect the calls
from the PBX, only one node appears to be listening for the SIP Trunk.
I also restarted the mediation service on one non-working mediation server node and the event viewer on the working mediation server node showed events that it restarted the service, Not the non-working one, it's like only one server from the pool
is doing as mediation server.
So even if I get a Lync Certified PBX/Media Gateway, the mediation service doesn't appear to be load balanced, or how does it work in order to do that?
Thanks.
Eduardo Rojas

Just a few things about what should be happening. Each front-end server should be listening on the port configured in topology builder for the mediation service. So if that is port 5060, verify that you see that port listening on all front-end servers
by running a netstat -ano. From a local workstation, also make sure you can connect to that port via a telnet IPAddress 5060. As you say, you should be able to send any of the three mediation servers an inbound call.
Outbound calls will round robin out of the enterprise pool. So you shouldn't see all of the calls coming out of a single server.
A few other items I would look into:
- Make sure your ports are right. Ensure that you are matching ports on the Avaya and Lync. It's not a hard requirement but makes life easier to troubleshoot. So if the Avaya is 5060, just make sure TCP/5060 enabled in your mediation pools
and that your gateways/trunks are also set to TCP/5060.
- Look outside the Lync Event Viewer and see if anything strange (.net errors) are being tossed anywhere else during startup of the mediation service. I once had to remove the mediation server installer (Program and Features | Remove) and rebootstrap
the server because something went sideways during an install.
Thanks,
Richard
Richard Brynteson, Lync MVP | http://masteringlync.com | http://lyncvalidator.com

Lync 2013 Edge server compatibility with Lyn 2010 Front end Pool

Hi All,
Technet article (http://technet.microsoft.com/en-us/library/jj688121.aspx) says the following:
If your legacy Lync Server 2010 Edge Server is configured to use the same FQDN for the Access Edge service, Web Conferencing Edge service, and the A/V Edge service, the procedures in this section are not supported. If the
legacy Edge services are configured to use the same FQDN, you must first migrate all your users from Lync Server 2010 to Lync Server 2013, then decommission the Lync Server 2010 Edge Server before enabling federation on the Lync Server 2013 Edge Server.
Can you tell me why it is you have to change the External Lync Web services URL during a migration to Lync 2013 from Lync 2010. What purpose does this serve?
Also can you clarify this and explain why this is required, why would you have to migrate all of your users, would a Lync 2013 Edge not talk to a Lync 2010 front-end?
Any help would be much appreciated. MANY THANKS.

Thank you very much for all your inputs.
We still have few questions:
Questions:
Can you tell me if Lync 2010 users will be able to login using mobility if we repoint the reverse proxy (TMG) web services publishing rule to the Lync 2013 server? Remember both systems Lync 2010 and 2013 are using the same web
services URL so they will both end up at the Lync 2013 server. Alternatively if not we will migrate all users to 2013, this is not a problem
In addition to this I cannot find anything that states how Exchange UM will operate when you are running from a backup pool and the exchange UM contacts are not available because they are homed on the server that is down. This
configuration is 2 x standard edition servers pool paired. How can we make sure Exchange voice mail works during a pool failover?
Call Park is not clear to me I read the following:
Lync Server 2013 provides new disaster recovery mechanisms in the form of failover and failback processes. These failover and failback processes support recovery of Call Park functionality by allowing
users who are homed in the primary pool to leverage the Call Park application of the backup pool when an outage occurs in the primary pool. Support for disaster recovery of the Call Park application is enabled as part of the configuration and deployment of
paired Front End pools.
Is this saying we need to deploy Call Park in the DR pool and use a different range of orbit numbers, or can we use the same range in the DR pool?
Further, I can see that Common Area Phones will be fine as they will log into the DR pool automatically. Response Groups need to be exported and imported to the DR pool. Incidentally these did not migrate well at all and have
caused us a big headache!
Any inputs will be greatly appreciated. Thanks again for all of your time.

Lync 2013 Front-End HA

We are currently in a co-existence environment with both Lync 2010 and 2013 running side-by-side.
There are 2 FE pools with pool pairing setup for Lync 2013. We have been carrying out some testing before migrating all of our users over.
We have an issue where when we take out one of the 2013 front end servers the client does not automatically reconnect to one of the other servers in the pool, occasionally it will but can take 10-15 mins to do this. If we simulate a similar test on the 2010
front ends the client reconnects in seconds.
I am using the Lync 2013 client

Thanks for your replies.
I have setup DNS LB for the pool name (this is working correctly) and I am using a kemp load balancer for the internal web services FQDN
I checked the EndPointConfiguration.Cache file and it just had the name of the front end server I was connected to. I deleted it and restarted my client now the EndPointConfiguration.Cache file has the name of the pool, the front end server that I am connected
to and the IP addresses of the servers in the pool, is that correct?
I tested the failure of the server I was connected to by removing the network adapter in VMware.
It took 44 seconds for my client to sign out and 1:15 after that to sign back in. My LPE took 2:18 to sign out and 1:22 after that to sign back in. Surely this cant be right?
During the time the failure happens and the client signs out, it is unusable.
I have had a look in the snooper logs but it is difficult to see the wood for the trees.
Thanks for your help.

Lync 2013 Front End SIP/2.0 500 Compression algorithm refused

I've deployed a brand new Lync 2013 environment hosted on Windows Server 2012 R2 that is currently in co-existence mode with my Lync 2010 environment.
I have SCOM 2012 monitoring the environment and it recently started reporting that one or more of my front end servers
was in a critical state. Diving into it revealed the following perf counter threshold was being tripped:
Time Sampled: 3/26/2014 2:33:30 PM
Object Name: LS:SIP - Responses
Counter Name: SIP - Local 500 Responses
Instance Name:
First Value: 14287
Last Value: 14340
Delta Value: 53
Using OCSLOGGER.exe on the front end to capture logs, i trapped the following:
TL_INFO(TF_PROTOCOL) [11]9138.1C58::03/26/2014-19:12:39.098.0022c780 (SIPStack,SIPAdminLog::ProtocolRecord::Flush:ProtocolRecord.cpp(265))[120713120] $$begin_record
Trace-Correlation-Id: 120713120
Instance-Id: 7D80EB
Direction: outgoing;source="local"
Peer: poolA.contoso.com:63820
Message-Type: response
Start-Line: SIP/2.0 500 Compression algorithm refused
FROM: <sip:poolA.contoso.com>;ms-fe=FEserver1.contoso.com
To: <sip:poolA.contoso.com>;tag=F8B88CAB38613EB380773027C56D94AF
CALL-ID: 986f9f568c794ce39d33d7158376157b
CSEQ: 1 NEGOTIATE
Via: SIP/2.0/TLS 10.154.228.225:63820;ms-received-port=63820;ms-received-cid=C3D7C00
Content-Length: 0
ms-diagnostics: 2;reason="See response code and reason phrase";HRESULT="0xC3E93C0F(SIP_E_REACHED_CONFIGURED_LIMIT)";source="FEserver1.contoso.com"
Server: RTC/5.0
$$end_record
The only recent change made to the front end servers was making the registry change outlined in this article:
http://support.microsoft.com/kb/2901554/en-us so i'm wondering if that has something to do with it.

The MSFT support person said to re-apply CU5 to the Director servers and reboot. Since this is impactful to the environment and I would have to do reboots anyway, I opted to go the route of installing the more recent update so....
Last weekend I updated my Lync environment with what I think is considered CU6, the September 2014 updates for Lync 2013 Server (https://support.microsoft.com/kb/2809243) and still no luck. The front
end servers are fine; no excess SIP 500 errors occurring there but within 30 minutes of removing the SCOM override on the Director servers the alerts started firing again.
I reinstated the override in SCOM for the Directors and had my case with Premier support un-archived. The MSFT support person said if the alerts didn't go away she was going to have to engage the Lync product group for help. We'll see where it
goes from here.
JKuta

Strange issue with 3.6.3 VPN Client and IOS firewall

I'm able to establish a VPN connection from the VPN Client to the e0/0 interface of the IOS FW/VPN router and pass encrypted traffic.
Whenever I initiate a connection to something on the "Internet" from the LAN (e0/1) of the router, a temporary ACL entry is added to ACL 103 as it should be and I'm able to get out on the Internet from the internal LAN; however, I immediately lose my VPN connection from my PC Client when IOS FW adds those temporary "return entries".
Router is running 12.2(13)T.
Anyone else having issues like that? I've looked everywhere on cisco.com and elsewhere but I don't see anyone having a similar issue.
You Cisco gurus have any thoughts?
Thanks,
Jamey
Config below:
jamey#wr t
Building configuration...
Current configuration : 3947 bytes
! Last configuration change at 16:27:03 GMT Wed Jan 22 2003 by jdepp
! NVRAM config last updated at 00:14:38 GMT Wed Jan 22 2003 by jdepp
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec localtime show-timezone
service password-encryption
hostname "jamey"
no logging buffered
no logging console
username XXXX password 7 XXXXX
clock timezone GMT 0
aaa new-model
aaa authentication login tac local
aaa session-id common
ip subnet-zero
no ip domain lookup
ip inspect name myfw ftp
ip inspect name myfw realaudio
ip inspect name myfw smtp
ip inspect name myfw streamworks
ip inspect name myfw vdolive
ip inspect name myfw tftp
ip inspect name myfw rcmd
ip inspect name myfw tcp
ip inspect name myfw udp
ip inspect name firewall http java-list 3
ip audit notify log
ip audit po max-events 100
crypto isakmp policy 3
encr 3des
hash md5
authentication pre-share
group 2
crypto isakmp nat keepalive 20
crypto isakmp client configuration group XXXX
key XXXXXXX
dns x.x.x.x
domain xxx.com
pool ipsec-pool
acl 191
crypto ipsec security-association lifetime kilobytes 536870911
crypto ipsec security-association lifetime seconds 86400
crypto ipsec transform-set foxset esp-3des esp-md5-hmac
crypto dynamic-map dynmap 10
set transform-set foxset
crypto map clientmap client authentication list tac
crypto map clientmap isakmp authorization list XXXXX
crypto map clientmap client configuration address respond
crypto map clientmap 10 ipsec-isakmp dynamic dynmap
interface Loopback10
description just for test purposes
ip address 172.16.45.1 255.255.255.0
interface Ethernet0/0
description "Internet"
ip address x.x.x.x 255.255.255.224
ip access-group 103 in
ip inspect myfw out
no ip route-cache
no ip mroute-cache
half-duplex
crypto map clientmap
interface Ethernet0/1
description "LAN"
ip address 192.168.45.89 255.255.255.0
no ip route-cache
no ip mroute-cache
half-duplex
ip local pool ipsec-pool 192.168.100.1 192.168.100.254
ip classless
ip route 0.0.0.0 0.0.0.0 Ethernet0/0
no logging trap
access-list 3 permit any
access-list 103 permit ip 192.168.100.0 0.0.0.255 any log
access-list 103 permit icmp any any log
access-list 103 permit udp any eq isakmp any log
access-list 103 permit esp any any log
access-list 103 permit ahp any any log
access-list 103 permit udp any any eq non500-isakmp log
access-list 103 permit tcp any any eq 1723 log
access-list 103 permit udp any any eq 1723 log
access-list 103 deny tcp any any log
access-list 103 deny udp any any log
access-list 191 permit ip 192.168.45.0 0.0.0.255 192.168.100.0 0.0.0.255
access-list 191 permit ip 172.16.45.0 0.0.0.255 192.168.100.0 0.0.0.255
radius-server authorization permit missing Service-Type
call rsvp-sync
line con 0
line aux 0
line vty 0 4
exec-timeout 0 0
password XXXXXX
line vty 5 15
end
Some debugging info:
At this point, my VPN PC is successfully connected to the e0/0 VPN router and assigned IP of 192.168.100.2. It is running constant pings to 192.168.45.67 and 172.16.45.1 (172.16.45.1 is a loopback on the router for testing), 192.168.45.67 is a host on the internal network.
.Jan 22 01:27:38.284: ICMP type=8, code=0
.Jan 22 01:27:38.288: IP: s=192.168.45.67 (Ethernet0/1), d=192.168.100.2 (Ethern
et0/0), g=192.168.100.2, len 60, forward
.Jan 22 01:27:38.288: ICMP type=0, code=0
.Jan 22 01:27:38.637: IP: s=192.168.45.145 (Ethernet0/0), d=255.255.255.255, len
40, access denied
.Jan 22 01:27:38.637: UDP src=2301, dst=2301
.Jan 22 01:27:38.641: IP: s=192.168.45.145 (Ethernet0/1), d=255.255.255.255, len
40, rcvd 2
.Jan 22 01:27:38.641: UDP src=2301, dst=2301
.Jan 22 01:27:38.761: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
.Jan 22 01:27:38.765: IP: s=192.168.100.2 (Ethernet0/0), d=172.16.45.1, len 60,
rcvd 4
.Jan 22 01:27:38.765: ICMP type=8, code=0
.Jan 22 01:27:38.765: IP: s=172.16.45.1 (local), d=192.168.100.2 (Ethernet0/0),
len 60, sending
.Jan 22 01:27:38.765: ICMP type=0, code=0
.Jan 22 01:27:39.282: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
.Jan 22 01:27:39.286: IP: s=192.168.100.2 (Ethernet0/0), d=192.168.45.67 (Ethern
et0/1), g=192.168.45.67, len 60, forward
.Jan 22 01:27:39.286: ICMP type=8, code=0
.Jan 22 01:27:39.286: IP: s=192.168.45.67 (Ethernet0/1), d=192.168.100.2 (Ethern
et0/0), g=192.168.100.2, len 60, forward
.Jan 22 01:27:39.290: ICMP type=0, code=0
.Jan 22 01:27:39.763: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
.Jan 22 01:27:39.767: IP: s=192.168.100.2 (Ethernet0/0), d=172.16.45.1, len 60,
rcvd 4
.Jan 22 01:27:39.767: ICMP type=8, code=0
.Jan 22 01:27:39.767: IP: s=172.16.45.1 (local), d=192.168.100.2 (Ethernet0/0),
len 60, sending
.Jan 22 01:27:39.767: ICMP type=0, code=0
.Jan 22 01:27:40.283: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
.Jan 22 01:27:40.287: IP: s=192.168.100.2 (Ethernet0/0), d=192.168.45.67 (Ethern
et0/1), g=192.168.45.67, len 60, forward
.Jan 22 01:27:40.287: ICMP type=8, code=0
.Jan 22 01:27:40.287: IP: s=192.168.45.67 (Ethernet0/1), d=192.168.100.2 (Ethern
et0/0), g=192.168.100.2, len 60, forward
.Jan 22 01:27:40.291: ICMP type=0, code=0
.Jan 22 01:27:40.596 GMT: %SEC-6-IPACCESSLOGNP: list 103 permitted 50 216.16.193
.52 -> <VPN ROUTER E0/0 INTERFACE>, 222 packets
.Jan 22 01:27:40.596 GMT: %SEC-6-IPACCESSLOGP: list 103 permitted udp 216.16.193
.52(500) -> <VPN ROUTER E0/0 INTERFACE>(500), 16 packets
here is where I initiate a telnet connection to a host 2.2.2.2 (a dummy host on the "Internet")
from a host on the internal side (LAN) (192.168.45.1)
.Jan 22 01:27:40.600: IP: s=192.168.45.1 (Ethernet0/1), d=2.2.2.2 (Ethernet0/0),
g=2.2.2.2, len 44, forward
.Jan 22 01:27:40.600: TCP src=38471, dst=23, seq=953962328, ack=0, win=4128
SYN
.Jan 22 01:27:40.764: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
here is where by VPN connection breaks
.Jan 22 01:27:40.768: IPSEC(epa_des_crypt): decrypted packet failed SA identity
check
.Jan 22 01:27:41.285: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
.Jan 22 01:27:41.285: IPSEC(epa_des_crypt): decrypted packet failed SA identity
check
.Jan 22 01:27:45.773: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
.Jan 22 01:27:45.777: IPSEC(epa_des_crypt): decrypted packet failed SA identity
check
.Jan 22 01:27:46.774: IP: s=<VPN PC CLIENT> (Ethernet0/0), d=<VPN ROUTER E0/0 INTERFACE> (Ethern
et0/0), len 112, rcvd 3, proto=50
.Jan 22 01:27:46.774: IPSEC(epa_des_crypt): decrypted packet failed SA identity
check

Ok..I found the bug ID for this:
CSCdz46552
the workaround says to configure an ACL on the dynamic ACL.
I don't understand what that means.
I found this link:
http://www.cisco.com/en/US/products/sw/secursw/ps2138/products_maintenance_guide_chapter09186a008007da4d.html#96393
and they talk about it, but I'm having a hard time decoding what this means:
"To specify an extended access list for a crypto map entry, enter the match address crypto map configuration command. This access list determines which traffic should be protected by IPSec and which traffic should not be protected by IPSec. If this is configured, the data flow identity proposed by the IPSec peer must fall within a permit statement for this crypto access list. If this is not configured, the router will accept any data flow identity proposed by the IPSec peer. However, if this is configured but the specified access list does not exist or is empty, the router will drop all packets."

Are Registrar pool and Front end pool one and the same?

Hi,
What is the RegistrarPool parameter which is used in Enable-CsUser command?
Is it same as Front end pool because whenever I search for information on Registrar pool, I end up with the links explaining about Front end pools?
Are there any msdn or technet links which talk about this?
Thanks in advance,
Sandeep

Hi Sandeep,
The registrar pool is the pool where user's Lync account is homed.
So if you have a single pool in your Lync environment, then the registrar pool will be same as front end pool. If you have multiple front end pools and you want to find out a user's registrar pool, you can
1. either check the user account in control panel
2. Check the parameter RegistrarPool for a user by running "get-csuser -identity useralias"
Hope this helps.
Regards,

URL issue with Windows 7 Internet Explorer 11 and SAP NW PI 7.

Hello SAP community,
I am facing a strange issue with Windows 7 - Internet Explorer 11 and SAP NW java services (I hope I am in the correct discussion) ...
When I try to open URL http://sapserver.hosters-name:port it is working so far with Windows 7 and Internet Explorer 11.
But when I click than on NWA (example), I am getting "http 500 server error".
I don't have the issue, when I start-up a VMware Workstation with Windows XP and Internet Explorer 8.
But now the strange part: In our network DNS (Domain Name Service), we can also open the URL by http://sapserver.our-dns:port.
Than it is working without problems with Windows 7 and Internet Explorer.
I would agree to state the comment - it is just a Windows 7/Internet Explorer 11 issue, if it wouldn't work for both URLs (http://sapserver.hosters-name:port = problem URL; http://sapserver.our-dsn:port = working).
We are using a SAP NW PI 7.x system. Some URLs for PI are using http://sapserver.hosters-name:port/java service.
Do you have any hints what is cause the issue - I suspect some with Internet Explorer and Firefox (because with Google Chrome at least the URL for NWA is opened, beside the issue, Google Chrome can't display NWA content)?
Thanks for your help.
Best regards
Carlos

Hi all,
I think I found the solution.
The reason seems to be, the domain name for http://sapserver.our-dns:port, "our-dns" was already added to the compatibility view settings of Microsoft Internet Explorer.
That seemed to be the reason, why it was working with http://sapserver.our-dns:port.
When I now added for http://sapserver.hosters-name:port the domain "hosters-name" to the compatibility view settings it is now working.
Internet Explorer Options => Settings for compatibility view => Add domain
Best regards
Carlos

Lync 2013 On Prem - Front End Pool - Second server in pool becomes unavailable when first server is offline

We have one front end pool, that contains 2 front end servers running Lync Server 2013.
When the first server, LFE01 goes offline (to be restarted for instance), the second front end server LFE02 in the same pool's Lync services will suddenly stop and will refuse to start until LFE01's Lync services have started again.
During this time, the Lync client will go from full functioning mode whilst LFE01 is up and running, to reduced functionality (when LFE01 is restarting), to the user being signed out of Lync and not able to log back in. As soon as LFE01 comes back up, users
can log back in to Lync.
We'd ideally like LFE02 to take over the front end server role whilst LFE01 is restarting, and vice-versa.
Checking the event logs on LFE02, I can see the following errors when LFE01 is offline:
This process was not able to update its health status
The Audio-Video Conferencing Server failed to send health notifications to the MCU factory at https://frontendpool.contoso.com:444/liveserver/mcufactory/.
Failure occurrences: 30, since 7/11/2013 3:40:38 PM.
Cause: Either the Front End service is not running, or poor network connectivity.
Resolution:
Verify that the Front End Service is available, and its machine is visible over the network.
This process was not able to update its health status
The IM Conferencing Server failed to send health notifications to the MCU factory at https://frontendpool.contoso.com:444/liveserver/mcufactory/.
Failure occurrences: 30, since 7/11/2013 3:40:42 PM.
Cause: Either the Front End service is not running, or poor network connectivity.
Resolution:
Verify that the Front End Service is available, and its machine is visible over the network.
Server startup is being delayed because fabric pool manager is initializing.
Cause: This is normal when Pool is bootstrapped and indicates that the Front-End is waiting for a quorum of other Front-Ends to be started.
Resolution:
If this event recurs persistently, ensure that 85% of the Front-Ends configured for this Pool are up and running. For 2 or 3 machine Pools, initial cold-start of the Pool requires all machines to be started. If multiple Front-Ends have been recently
decommissioned, run Reset-CsPoolRegistrarState -ResetType QuorumLossRecovery to enable the Pool to recover from Quorum Loss and make progress.
Does the first server in the pool need to be up at all times for the second server to be running? If so, I may need to re-plan my redundancy.

I can't believe how inaccurate these statements are.
Yes as per Microsoft it is best practice to have 3 FE in a pool but that absolutely does not mean that if you have 2 FE server in a pool that your pool will stop working!!
In case when you do have 2 FE servers in a pool your Back End primary database server will act as a vote to keep the quorum for single server still left in a pool and all your clients will keep operating in a pool with one FE still running.
The problem with having 2 FE in a pool as per Microsoft documentation is as follows:
If one of the two Front End Servers goes down, you should try to bring the failed server back up as soon as you can. Similarly, if you need to upgrade one of the two servers, bring it back
online as soon as the upgrade is finished.
If for some reason you need to bring both servers down at the same time, do the following when the downtime for the pool is finished:
The best practice is to restart both Front End Servers at the same time.
If the two servers cannot be restarted at the same time, you should bring them back up in the reverse order of the order they went down.
If you cannot bring them back up in that order, then use the following cmdlet before bringing the pool back up:.
http://technet.microsoft.com/en-us/library/gg412996.aspx
I tested this in my environment which I currently am running with 2 FE servers and I can categorically confirm that pool will continue operating.
However, with all this said I did notice that clients with connection to FE server that is shut down take anywhere from 2-9 min to reconnect. I was trying to figure out why such a long delay until clients reconnect. Possibly it might be because there are
2 FE servers in a pool and Back End server is taking a while to vote in turn delaying auto reconnect process for clients. Second possibility that I'm looking into is that we deployed HLB for sip traffic internally as well and I'm curious if using DNS LB would
fix this delay.
I'm just so disappointed how inaccurate some of these accepted answers above are.

Network ports between Lync front end pools

Dear All,
One of my client have two lync front end pools, at present all the ports are opened between these two pools, now we want to restrict the network ports between the pool servers.
please help me to, which are the ports need to open between different lync front end pools.

There's a bunch of them, take a look at the resources below:
Ports and protocols for internal servers in Lync Server 2013 https://technet.microsoft.com/en-us/library/gg398833(v=ocs.15).aspx
Lync Firewall Rules Viewer http://blogs.technet.com/b/nexthop/archive/2012/07/03/lync-firewall-rules-viewer.aspx
If this helped you please click "Vote As Helpful" if it answered your question please click "Mark As Answer"
Georg Thomas | MVP (Skype for Business)
Blog skype4bexpert.com | Twitter
@georgathomas
Lync/Skype for Business Edge Port Check (Beta)
This forum post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

The Lync Server Front-End service terminated with service-specific error %%-1008124893.

Hello, everyone
I've installed Lync Server 2010. There was no error during installation. But when i start Lync Server Front End Server, i'm getting following error:
The Lync Server Front-End service terminated with service-specific error %%-1008124893.
In event viewer:
The evaluation period for Microsoft Lync Server 2010 has expired. Please upgrade from the evaluation version to the fully licensed version of the product. Look at help for Setup.exe to learn how to upgrade from evaluation version to the licensed version.
Cause: The evaluation period for Microsoft Lync Server 2010 has expired.
I've upgraded Lync Server according to http://technet.microsoft.com/en-us/library/gg521005.aspx?ppud=4
Also I've installed all Lync Server updates.
But I still could not start Lync Front End Sever. How can I solve this problem?
Thanks

Hi,
Can you try to run
start-cswindowsservice -report c:\report.html
and post the report so we can have more information about your problem ?
Regards,
Adrian TUPPER - ABC Systemes - http://thelyncexperience.blog.com/ If answer is helpful, please hit the green arrow on the left, or mark as answer Thank you

How Front End pool deals with fail over to keep user state?

   Hello to all, I searched a lot of articles to understand how Lync 2010 keeps user state if a fail happens in a Front Pool node, but didn't find anything clear.
     I found a MS info. about ths topic : " The Front End Servers maintain transient information—such as logged-on state and control information for an IM, Web, or audio/video (A/V) conference—only for the duration of a user’s session.
This configuration
is an advantage because in the event of a Front End Server failure, the clients connected to that server can quickly reconnect to another Front End Server that belongs to the same Front End pool. "
    As I read, the client uses DNS to reconnect to another Front End in the pool. When it reconnects to an available server, does he lose what he/she was doing at Lync client? Can the server that is now hosting his section recover all
"user's session data"? Is positive, how?
   Regards, EEOC.

The presence information and other dynamic user data is stored in the RTCDYN database on the backend SQL database in a 2010 pool:
http://blog.insidelync.com/2011/04/the-lync-server-databases/ If you fail over to another pool member, this pool member has access to the same data.
Ongoing conversations and the like are cached at the workstation.
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer".
SWC Unified Communications

Strange issue with speaker - stays on after a call has ended

Hi all,
I have the latest iOS version (7.1) on my iPhone 5.
I haven't had any hardware issues before, but 2 days ago something strange has began happening.
Strange issue with speaker - it stays on after a call has ended and plays the sounds that it gets from the microphone.
Only way to stop it is to make another call and hang up.
Any ideas?

oops...we're in the same boat....look m8 that ios 7.1 is rubish i recently after updating mine the ear stop working i called apple customer care we went throu wiv that adviser we restore the phone up 2...3 times nofin happen then da guy told me finally it was not a software problem....but hardware problem and they booked me up 2 take it 2 the near apple store because it is only from apple u can get da matter fixed however if your phone where unlocked outside your network provider or again from the coner street tech....? 4get cos once those form street unlock your phone you just have the same cover or boby let say it ....but your IMEI and all manufacture detail will changed........the good news is if your phone still have manufacture waranty iz free from apple if your waranty run out? apple will ask you 2 pay up 290£.....
hope this replay may hel you m8
stay bless

Could you tell me if it would be supported to pair a two node enterprise edition front end pool inc mirror sql with a one node enterprise edition front end pool inc single sql?

Hi all,
Could anyone tell me if it would be supported to pair a two node enterprise edition front end pool inc mirror sql with a one node enterprise edition front end pool inc single sql?
MUCH THANKS.

The answer from TechNet found at http://technet.microsoft.com/en-us/library/jj204697.aspx Is, and I quote:-
Enterprise Edition pools can be paired only with other Enterprise Edition pools. Similarly, Standard Edition pools can be paired only with other Standard Edition pools.
Also, "Neither Topology Builder nor topology validation will prohibit pairing two pools in a way that does not follow
these recommendations. For example, Topology Builder allows you to pair an Enterprise Edition pool with a Standard Edition pool.
However, these types of pairings are not supported."
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question, please click "Mark As Answer"

Strange issue with Lync 2013 Front end pool and UC Endpoints.

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