Moving witness server to CAS server two Exchange 2013 servers with a DAG

Inherited a situation where there is one Exchange 2007 Build 83.6 server running on Win2008R2, acting as witness, and hub transport and yes is a file server too. In addition there is relays, email and service accts that need to be moved to Exchange
2013.
Presently there are two Exchange 2013 cu3 servers that are part of a DAG that also run on Win 2008r2... We wish to add another node to the DAG, and move the witness to another server.
Do I need to also add a CAS Exchange 2013 server to replace the Ex 2007 server?
Can this server also act as the Witness?
What would be the best practices for this senario. All of these machines are VM's.
With an odd number of nodes, the File Share Witness will not be used, but you can still define it.
Any server ( any including any non-Exchange server) can serve as the FSW as long as its not a mailbox server n the DAG and it has the Exchange Trusted SubSystem group in the local admin group on that server.
Since you are using VMs, ensure the FSW isn't on the same host as a MBX DAG member.
Not sure what you mean by adding a CAS Exchange 2013 server. Do you mean you have not installed the CAS role yet for 2013? If so, then absolutetly you need one.
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Similar Messages

Mailbox migration between two Exchange 2013 servers is horribly slow

Hi,
when migrating mailbox between 2 exchange 2013 servers,it s horribly slow. I have found some articles which describing problems about content indexing and missing AD group. This is not my problem, I have tried solutions but it didn't work. Both exchange
are next to each one, same VLAN, same switch. Just migrating between databases.
When I start batch jobs it is migrating only 1 mailbox at once and speed is really slow (2000 - 3000 mail items per 5 minutes). So mailboxes which have 10GB it's migrating 3 hours. My server is on 1gbps LAN.
I have also checked MsExchangeMailboxReplication.exe.config on both servers:
    MaxActiveMovesPerSourceMDB="20"
    MaxActiveMovesPerTargetMDB="20"
    MaxActiveMovesPerSourceServer="100"
    MaxActiveMovesPerTargetServer="100"
    MaxTotalRequestsPerMRS="100"
Do you have any idea where to look why only 1 mailbox is migrating at once?
Thanks

Hello,
For the reason why only 1 mailbox is migrating at once when you start batch jobs, there is no official articles or blog to explain it.
I recommend you check if the speed is slower when you move a smaller mailbox. If the issue doesn't occur, I recommend you set
the AllowLargeItems parameter.
Here are some articles for your reference.
New-MigrationBatch
http://technet.microsoft.com/en-us/library/jj219166(v=exchg.150).aspx
Exchange 2013 Local Mailbox Moves
http://www.msexchange.org/articles-tutorials/exchange-server-2013/mobility-client-access/exchange-2013-local-mailbox-moves-part1.html
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Cara Chen
TechNet Community Support

NO Server Unavailable. 15 on Exchange 2013

Hello,
After a SELECT "INBOX" I'm getting NO Server Unavailable. 15
SELECT "INBOX"
NO Server Unavailable. 15
Any ideas?
I've tried all sorts of adjustments to IMAP to no avail. This used to work on our Exchange 2010 server but since migrating to 2013 we are having issues.
Thanks
Bradley

Hi ,
Need more clarity on your query.Please share me .
1.Are you trying to configure the mailbox account on imap ? If so on which stage you are facing the error ?
2.Is this issue is happening for all the users else for an single user ?
3.For imap configuration below mentioned services need to be enabled on exchange cas and mailbox server.
Cas server :
Microsoft Exchange IMAP4
Mailbox server :
Microsoft Exchange IMAP4 Backend
4.Make sure the respective mailbox is having imap feature is enabled on it.
get-casmailbox -identity "[email protected]" | ft -au
5.Most importantly we need to assign the san certificate for the imap service in exchange.
6.If all of the above settings is fine , then the final option would be to enable the protocol logging for the imap in exchange to have a deep dig on this case.
Please feel free to reply me if you have any queries.
Thanks & Regards S.Nithyanandham

Migrating from 2010 windows nlb cas array to exchange 2013 using netscaler for HLB

i currently have exchange 2010 sp3 setup as follows
2 cas/ht using windows nlb for array.internal.com as the nlb name
2 mailbox servers using 1 dag for replication between them.
I would like to stand up 2 new CAS 2013 sp1 servers(2012 r2) and use our netscaler hlb to load balance and do ssl offloading.
id like to use the hlb to load balance and ssl offload all possible traffic not just owa, i.e. activesync etc.
the netscaler is running version 10.5.
does anyone have any thoughts on how to perform such a migration?
id like to make this as seamless as possible for the user, so no owa name change or anything like that.
thx in advance for any help.

Exchange 2013 CAS cannot be managed effectively without an Exchange 2013 mailbox server since the CAS won't run the Exchange 2013 management tools without it. Your Exchange 2013 servers should simply have both roles. There are few cases where
splitting the roles has any business value.
If what you're planning to do is within the same forest and organization, then it's a "transition", not a "migration". What you are asking to do is easy. Build the Exchange 2013 servers, configure load balancing, test
access, and then switch the DNS records to point to them.
Personally, I would skip the SSL offloading. It's my opinion that it makes the solution more difficult to troubleshoot without providing any real benefit.
Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Exchange 2013: Problem with Default Global Address List after migration

I just completed a migration from Exchange 2007 to Exchange 2013. The 2007 box has been decommissioned just last week. I have been seeing weird issues with our offline addressbook and global address list, since the migration, but always thought
it was related to Ex2007. Well the issues still exist and here's what i've found so far:
1. If any user goes to Schedule Appointment in Outlook, and they click the Rooms button (on the Scheduling Assistant page), we get a LONG wait (about 5 mins or more) and then an error that says: "The operation could not be completed because
an offline address book is not available. Download a copy of the offline address book." When i click OK, the address book is up, with the "All Rooms" list showing blank (we have 3 rooms in Exchange currently).
2. Now if I go to the Address Book in Outlook it opens to the GAL and it's up to date... I can also force an update to the offline address book after adding a new group or entry, so i know offline address books are being updated properly and
working. HOWEVER, if i go to any of the other address lists (besides Contacts and GAL) under All Address Lists (All Contacts, All Groups, All Rooms, All Users and Public Folders) I get the same error given above: "The operation could not be
completed because an offline address book is not available. Download a copy of the offline address book."
3. I went to the Exchange 2013 EAC and went to Organization -> Address Lists. Everything under here said 'NO' under the Up-to-Date column. When i looked at the properties on each list, and clicked save, I had to update to the new version.
After doing this, the Up-to-Date column said 'YES'. I could do all lists EXCEPT for the GAL. It still says 'NO'
4. The last thing i did was set my Outlook to NOT be in cached mode. This should give me a direct connection to the GAL and all lists, if I'm not mistaken... So when i do this, I cannot even open see the GAL. The ONLY option in the
Address Book that comes up is Contacts (which are my personal ones).
5. I just now ran Get-GlobalAddressList | fl in powershell on the Ex2013 server. I see some things that make me wonder... First; nothing in the RecipientFilter field, however, there is something in the LdapRecipientFilter field.
Second; the RecipientFilterType field says "Legacy". and Third; the RecipientFilterApplied field says "False".
Didn't know what these should all be, but it appears maybe this is the cause of all my issues?? Can someone help me out here.. even if i have to recreate a new GAL, i'm fine with that, I just don't know all the steps to do so. I just need it
to work!
Thanks
Jeff
-Jeff

Hi,
In my opinion, it is better to confirm whether the GAL is good, first.
How about the GAL working in OWA?
If GAL working well in OWA, it seems the issue on the Outlook Client or Connectivity side.
Please trying to run Outlook on the safe mode to avoid some AVs, add-ins and firewall for testing.
Please follow the steps as below to narrow down the OAB issue.
Following are the locations that .lzx files in CAS server and BMX server:
CAS:
C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\OAB
MBX:
C:\Program Files\Micorosft\Exchange Server\V15\ExchangeOAB
Please verify whether the .lzx files update to the latest.
1. If the .lzx files in MBX server not update to the latest.
It should be an issue on the OAB generation side.
2. If the .lzx files in MBX server is latest, but CAS server not.
It should be a distribution issue.
1) Please run Get-OabVirtualDirectory command in EMS to verify whether at least one OAB VD exist in the org. If not, please create a new one.
2) Please make sure whether any setup for Web Distribution. Selecting the “Enabling an Offline Address Book for Web Distribution” checkbox.
3) Please force restart File Distribution services to distribute OAB files manually.
3. If the .lzx files in MBX server and CAS server are all update to the latest.
It should be the connectivity between CAS server and Client issue.
1)Please verify the network.
2)Please check DNS, MX, etc. configuration.
3)Please run “Test E-mail AutoConfiguration” to check the AutoDiscover details.
   Please make sure the OAB URLs are correct.
   If the OAB URLs are incorrect, please using following command to re-set them:
   Set-OABVirtualDirectory -Identity "ServerFQDN\OAB (Default Web Site)" -ExternalUrl
https://www.contoso.com/OAB -InternalUrl
https://mail.contoso.com/OAB
4)Please checking the App log and finding solutions from Microsoft Technet articles or KB, according to the Event ID.
5)If it still not working after performing the methods above unfortunately, please trying to re-build OAB Virtual Directory.
   Article for reference:
   Remove, Re-Create, and Reconnect an Offline Address Book Virtual Directory
http://technet.microsoft.com/en-us/library/bb123595(v=exchg.141).aspx
Hope it is helpful
Thanks
Mavis
Mavis Huang
TechNet Community Support

Error 1006 - Changing Ad Site for subnet where exchange 2013 servers was setup

We wanted to change Ad site for subnet where exchange 2013 servers was setup.
When we do that error id 1006 appear on 2 MBX Servers :
The Microsoft Exchange Mailbox Replication service was unable to process jobs in a mailbox database.
Database: Database02
Error: An attempt to logon cross-site for Mdb 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx' was prevented to Server 'yyyyyyyy-yyyy-yyyy-yyyy-yyyyyyyyyyyy' in Site 'DomainAAA/Configuration/Sites/SiteB'. Local site is 'DomainAAA/Configuration/Sites/SiteA'.
DomainAAA - Our Domain
SiteA - AD site which temporarily cover subnet A and Subnet B
In subnet A are installed 2 DCs (Global Catalog) and other aplication servers.
In subnet B are installed all EX2013 servers (2 MBX and 2x CAS) ,1 DC (Global Catalog) and other app servers.
SiteB - new created AD site intended for subnet B
These subnets are on diferent physical location.
When we change Ad site for subnetB from the AD siteA to AD SiteB, above error appear.
There is a object ExchEdgeSyncService under the AD site : SiteA , where the installation EX2013 was done.
So do We need to create the new edgesyncservice under the siteB ?
What steps do we have to make ?
Our intention is to eventually remove all servers from the siteA and move to to SiteB.
So that siteA will no longer exist.
Thanks in advance , and sorry for bad english.
Best regards

Hi,
Why don't you just extend the VLAN so you don't have to create another site and do changes so much
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@ikrisna

RPC error when configuring Exchange 2013 servers in 2nd site

Hello. I'm running into an error when trying to configure any of my Exchange 2013 servers in my 2nd AD site. To get into the loop of what my server structure looks like, please check below:
Site 1 servers:
DC1 - Domain Controller
DC2 - Domain Controller
CAS1 - CAS server
CAS2 - CAS server
MBX1 - Mailbox server
MBX2 - Mailbox server
MATHAFTMG - TMG server
Site 2 servers:
CCCDC1 - Domain Controller
CCCDC2 - Domain Controller
CCCCAS1 - CAS server
CCCCAS2 - CAS server
CCCMBX1 - MBX server
CCCMBX2 - MBX server
CCCTMG - TMG server
Currently I have a site-to-site vpn connection between site 1 and site 2 TMG servers via Internet connection; I can access the servers of the other site perfectly (whether I am in Site 1 or Site 2).
All user mailboxes are currently in Site 1 MBX servers; when users are in Site 2, they connect to the CAS servers in Site 1 to access their mailboxes.
Many users will stay permanently in Site 2, so it makes sense to have Exchange servers in Site 2 to provide faster access to mailboxes. I created the Site 2 domain controllers, and made sure AD replication is working; and it is. I then added the MBX servers
and CAS servers in Site 2 in this order: CCCMBX1, then CCCCAS1, then CCCMBX2, then CCCCAS2.
All Exchange servers in Site 2 installed beautifully. But then I tried to access the servers via ECP to proceed with the configuration. In ECP, I click on the server link, and all Exchange servers in both sites appear. If I try to configure the virtual directories
of Site 1 CAS servers, no problem. But when I try to configure virtual directories of Site 2 CAS servers, I get this error message:
The task wasn't able to connect to IIS on the server 'CCCCAS1.domain.com'. Make sure that the server exists and can be reached from this computer: The RPC server is unavailable.
The virtual directories issue is just an example. Same thing happens if I try to configure Outlook Anywhere for Site 2 CAS servers.
Users connect to Site 1 CAS servers via mail.domain.com. I have the A record mail.domain.com pointing to the IP address of CAS1 server, and another A record mail.domain.com pointing to the IP address of CAS2 server. Not the best load balancing going on here,
but it works great with Exchange 2013.
From mail.domain.com I can access OWA and ECP internally and externally; no problems there. From ECP I can access and configure any Site 1 Exchange 2013 servers.
The only problem is when I access ECP to configure the Site 2 Exchange 2013 servers, I get the same error message:
The task wasn't able to connect to IIS on the server '<server name>.domain.com'. Make sure that the server exists and can be reached from this computer: The RPC server is unavailable.
Even if I try to access a Site 2 Exchange 2013 server via https://localhost/ecp to configure it, it get the same error message.
I updated all Exchange 2013 servers in both sites to CU2 v2 and rebooted the servers in the proper order; problem still there.
Any clue what might the problem be?
Thank you!

Hello. I'm running into an error when trying to configure any of my Exchange 2013 servers in my 2nd AD site. To get into the loop of what my server structure looks like, please check below:
Site 1 servers:
DC1 - Domain Controller
DC2 - Domain Controller
CAS1 - CAS server
CAS2 - CAS server
MBX1 - Mailbox server
MBX2 - Mailbox server
MATHAFTMG - TMG server
Site 2 servers:
CCCDC1 - Domain Controller
CCCDC2 - Domain Controller
CCCCAS1 - CAS server
CCCCAS2 - CAS server
CCCMBX1 - MBX server
CCCMBX2 - MBX server
CCCTMG - TMG server
Currently I have a site-to-site vpn connection between site 1 and site 2 TMG servers via Internet connection; I can access the servers of the other site perfectly (whether I am in Site 1 or Site 2).
All user mailboxes are currently in Site 1 MBX servers; when users are in Site 2, they connect to the CAS servers in Site 1 to access their mailboxes.
Many users will stay permanently in Site 2, so it makes sense to have Exchange servers in Site 2 to provide faster access to mailboxes. I created the Site 2 domain controllers, and made sure AD replication is working; and it is. I then added the MBX servers
and CAS servers in Site 2 in this order: CCCMBX1, then CCCCAS1, then CCCMBX2, then CCCCAS2.
All Exchange servers in Site 2 installed beautifully. But then I tried to access the servers via ECP to proceed with the configuration. In ECP, I click on the server link, and all Exchange servers in both sites appear. If I try to configure the virtual directories
of Site 1 CAS servers, no problem. But when I try to configure virtual directories of Site 2 CAS servers, I get this error message:
The task wasn't able to connect to IIS on the server 'CCCCAS1.domain.com'. Make sure that the server exists and can be reached from this computer: The RPC server is unavailable.
The virtual directories issue is just an example. Same thing happens if I try to configure Outlook Anywhere for Site 2 CAS servers.
Users connect to Site 1 CAS servers via mail.domain.com. I have the A record mail.domain.com pointing to the IP address of CAS1 server, and another A record mail.domain.com pointing to the IP address of CAS2 server. Not the best load balancing going on here,
but it works great with Exchange 2013.
From mail.domain.com I can access OWA and ECP internally and externally; no problems there. From ECP I can access and configure any Site 1 Exchange 2013 servers.
The only problem is when I access ECP to configure the Site 2 Exchange 2013 servers, I get the same error message:
The task wasn't able to connect to IIS on the server '<server name>.domain.com'. Make sure that the server exists and can be reached from this computer: The RPC server is unavailable.
Even if I try to access a Site 2 Exchange 2013 server via https://localhost/ecp to configure it, it get the same error message.
I updated all Exchange 2013 servers in both sites to CU2 v2 and rebooted the servers in the proper order; problem still there.
Any clue what might the problem be?
Thank you!

Configure legacy public folders where user mailboxes are on Exchange 2013 servers

Hello all,
I have mailboxes on an exchange 2013 server than need access to public folders on a 2010 server before I migrate them over. I followed the commands in the TechNet article with the subject "Configure legacy public folders where user mailboxes
are on Exchange 2013 servers" (sorry, I wasn't allowed to insert a link because I wasn't verified?). The problem is when I run the last command of "Set-OrganizationConfig -PublicFoldersEnabled Remote -RemotePublicFolderMailboxes ProxyMailbox1,ProxyMailbox2,ProxyMailbox3"
on the 2013 server, using the mailbox name I had created, it says it cannot be found. Of course I checked and the mailbox exists, is configured properly, and so is the new database. The 2013 EAC also sees the mailbox with no issues.
Can someone tell me why I am getting this error?
Thanks,
Shaibal

Hi Mavis,
Thank you for your response. I am the full domain admin, and check and was part of both groups mentioned above. Also, I have only one 2010 server with public folder, and so the command I am running on the 2013 looks like this: Set-OrganizationConfig
-PublicFoldersEnabled Remote -RemotePublicFolderMailboxes PFMailbox1. I even just created a second user and mailbox using the console instead of the shell, and still no luck.
Below is the error I get:
[PS] C:\Windows\system32>Set-OrganizationConfig -PublicFoldersEnabled Remote -RemotePublicFolderMailboxes PFMailbox2
Couldn't find object "PFMailbox2". Please make sure that it was spelled correctly or specify a different object.
    + CategoryInfo          : NotSpecified: (:) [Set-OrganizationConfig], ManagementObjectNotFoundException
    + FullyQualifiedErrorId : [Server=ZOR-EXCHANGE01,RequestId=cc567b2f-34d8-41ba-9261-143223566e06,TimeStamp=3/5/2015
    4:36:10 PM] [FailureCategory=Cmdlet-ManagementObjectNotFoundException] 2EF24201,Microsoft.Exchange.Management.Sys
temConfigurationTasks.SetOrganizationConfig
    + PSComputerName        : zor-exchange01.zubatkin.lan

Exchange 2013 CU6 with DAG - ECP Delete does not go to soft-delete state, retention policy ignored

I am not sure if this is a BUG or this is as intended. Typically if a mailbox is 'deleted' from the EAC or ECP console the user account is disabled and the mailbox is marked for removal (soft-delete) until the retention policy expires the item (default
30 days). However we deleted a mailbox and the mailbox was purged immediately as well as the user was moved to the hidden recycle bin in Active Directory.
We replicated this issue twice in a DAG environment, we do not have this issue in a non-DAG environment.
Question: Other than restoring from the backup, is there a way to recover the mailbox?
Thank You,
-Jake
Jacob Evans Jake of All Trades

Hi,
I tested in my lab, Exchange 2013 CU1 with DAG deployed, if I deleted a mailbox from EAC, then it would be a disconnected mailbox and the associated Active Directory user account was also deleted. I could find it under the Disconnected Mailbox.
Was the mailbox logged ever?
If you delete a mailbox that you never log in, it won't show as disconnected mailbox.
And for the question :"Question: Other than restoring from the backup, is there a way to recover the mailbox?", I'm afraid you have to recover from backup.
Best regards,
Belinda Ma
TechNet Community Support

How to configure Exchange 2013 OWA with Single Sign On

Hi All ,
How to configure Exchange 2013 OWA with Single Sign On ?
Thanks .

Hi,
From your description, I am not quite sure what you really want to achieve. Could you explain it furthermore? If you need to set up Exchange 2013 OWA single sign on with Exchange 2010, here is a helpful thread for your reference.
Exchange 2013 OWA Single Sign on with Exchange 2010
https://social.technet.microsoft.com/Forums/en-US/2899ebfc-8622-4cdc-8d77-d76b607618f7/exchange-2013-owa-single-sign-on-with-exchange-2010?forum=exchangesvrdeploy
If that is not your case, please feel free to tell me.
Best regards,
If you have feedback for TechNet Subscriber Support, contact
[email protected]
Amy Wang
TechNet Community Support

Networking two NI lookout servers with different windows OS

Can I networking two NI lookout servers with 50
I/O, one with windows98 SE and one with Withows XP pro.?

What's your lookout version on two computers? You need first to make two lookouts run, and then try to networking them. For example, if you run lookout 6.2 on windows 98, I'm not sure if it will work.
Ryan Shi
National Instruments

Probling with Throttling of Emails by Exchange 2013 servers

We are experiecing delay of emails for users because of the Throttlig on Exchange 2013 servers.
This is causing company wide Delay and users are complaining as it takes a lot of time for the queue to get cleared.
We called in Microsoft and they suggested some values changes to msexchangedelivery.exe.config file
We added the following values, but still we face issues when there is Email flood.
Any one faced this or any suggestions that you have.
mdimthyas

Hi mdimthyas,
Thank you for your question.
Could you tell more details which throttling was configured on Exchange 2013 in organization?
Could you tell me how long was emails in the queue?
Are there any other issue which could help us troubleshoot.
We could remove the customized throttling and re-configure it to check if the issue persist.
If there are any questions regarding this issue, please be free to let me know.
Best Regard,
Jim
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]
Jim Xu
TechNet Community Support

Need to know how to calculate and allocate the server side bandwidth between two exchange sites for DAG replication

Hi All,
Please have a look in to the below mentioned environment.
primary site :SITE 1
server 1
server 2
secondary site :SITE 2
server 3
Note : All the above three servers are in single DAG .All the database are mounted on the server (server 1) which is located in the primary site (I.E SITE 1).
On that 5 databases we are having 3500 users .Based on the user designation we have allocated the mailbox size.
Query : Each and every day we are having the large no copy queue length for all the five databases to the server located in SITE 2.
Please help me out on this and also tell me is there any tool available to exactly get the required bandwidth for the exchange servers located between the active directory sites.
Thanks & Regards S.Nithyanandham

I don't know of any tool that can calculate things for you but latency is the biggest thing you have to worry about. The other issues is looking at the network gear between the 2 sites. I have seen many times were switches get maxed out if they are set to
1 GB or even ports getting maxed out and need to bonded for more throughput. Test your latency from the edge of each site then test it within to see if there is a difference.
Regardless of their geographic location relative to other DAG members, each member of the DAG must have round trip network latency no greater than 500 milliseconds between each other member.
As the round trip latency between two Mailbox servers hosting copies of a database increases, the potential for replication not being up to date also increases. Regardless of the latency of the solution, customers should validate that the networks between
all DAG members is capable of satisfying the data protection and availability goals of the deployment. Configurations with higher latency values may require special tuning of DAG, replication, and network parameters, such as increasing the number of databases
or decreasing the number of mailboxes per database, to achieve the desired goals.
Round trip latency requirements may not be the most stringent network bandwidth and latency requirement for a multi-datacenter configuration. You must evaluate the total network load, which
includes client access, Active Directory, transport, continuous replication, and other application traffic, to determine the necessary network requirements for your environment.
http://technet.microsoft.com/en-us/library/dd638104(v=exchg.150).aspx
DJ Grijalva | MCITP: EMA 2007/2010 SPA 2010 | www.persistentcerebro.com

How to find out how many users are connected to Exchange 2013 servers in "Online" mode? This is coz, online mode causing server performance issues in our environment

All, Any script or method to find out how many users are connected to exchange servers in online mode?
Manju Gowda

Hi
You have to get the "RPC Client Access" log file in your CAS server. There you can see a column called "client-mode" and it has two modes such
as "classic" and "cached". From there you can get the two different client assess modes and their corresponding users.
probably take this file openup on excel and filter to see the two modes
Remember to mark as helpful if you find my contribution useful or as an answer if it does answer your question.That will encourage me - and others - to take time out to help you Check out my latest blog posts on http://exchangequery.com Thanks Sathish
(MVP)

Cannot Adding Mailbox Server for Database Copy for Exchange 2013 SP1

Before I upgraded to 2013 SP1 everything works find but after I upgrade to SP1 I cannot add database copy. the details are...
I have 2 sites
Site 1 : 4 Mailboxes (Mailbox01,Mailbox02,Mailbox03,Mailbox04)   + 2 CAS
Site 2 : 2 Mailboxes (Mailbox05,Mailbox06)   + 2 CAS (just for standby site)
So I have 2 DAG group  (6 Mailboxes separate to 3 Mailboxes for 1 DAG group Mailbox01,Mailbox02,Mailbox05 for DAG1 and Mailbox03,Mailbox04,Mailbox06 for DAG2)
After I upgrade Exchange 2013 to SP1 , I try to create new database on Mailbox01 and after that I try to add mailbox02 and mailbox05 to database copy of new database that I created.
"Mailbox05 can added to be database copy but Mailbox02 cannot add database copy for it , Error "Network path not found" occur" but Im very sure that path is the same for each mailbox database server.
so I try to create new database on Mailbox 03 and add database copy on mailbox04 and mailbox06.... the result is the same only Mailbox06 can add mailbox copy of database.
It look like I cannot have 2 mailbox in site 1 for database copy of each new database (I already try to create new database on Mailbox 02 and add database copy on mailbox01 and mailbox05 , the result is only mailbox05 can be database copy of database).
Please help me to fix this out.

Hi,
I recommend you check if the Remote Registry service is running on Mailbox01, Mailbox02, Mailbox03 and Mailbox04. If not, please start it and then add mailbox database copy to check the result.
Best regards,
Belinda
Belinda Ma
TechNet Community Support

Moving witness server to CAS server two Exchange 2013 servers with a DAG

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