Exchange server 2010 DAG failover
Hi team ,
We have configured exchange server 2010 in DAG environment .
We have added 3 mailbox server in DAG . but my active mailbox copy failed the database are failover to another passive copy server & status is mounted . after failover emails service are not working.
Note : We have also configured NLB on CAS server .All exchange servers placed in single AD site
Please suggest
Hi
So are all your exchange servers the same? settings?
have you tried to fail the DB back to its original server? all services started on the other server?
Similar Messages
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Exchange server 2010 DAG configuration
Dear Boss,
I would like to configure Exchange server 2010 with DAG . I have test lab . i would like to tell my test LAB setup .
One domain controller win-2008 X 64 Ent
Two Exchange server 2010 ( Role - Client Access, Mailbox) Each Server Two Network Cards with Different Classes
IP 192.168.44.50 , 51
IP 10.0.0.10 , 20
One Exchange server 2010 ( Role - Hub Transport )
IP 192.168.44.53
Pls tell me how can i create DAG
Note:- i would like to test below steps
1. Exchange server1 may be down or network link down how server 2 to work automatically without any disturbance
2. Exchange server2 may be down or network link down down how server 1 to work automatically without any disturbance
3. Hub transport server maybe down how it can be work ?
Regards
SubashHi Suriya,
To create a DAG, simply use the below commands from Exchange Management Shell:
New-DatabaseAvailabilityGroup -Name "DAGNAME" -WitnessServer HUBSERVERNAME
Add-DatabaseAvailabilityGroupServer –Identity DAGNAME -MailboxServer ExchangeServer1
Add-DatabaseAvailabilityGroupServer –Identity DAGNAME -MailboxServer ExchangeServer2
New-MailboxDatabase -Name DB1 -Server
ExchangeServer1
Add-MailboxDatabaseCopy -Identity DB1 -MailboxServer
ExchangeServer2
You can run your tests now, by restarting any of the servers, and you should be able to see the DB1 will automatically failover & failback between the nodes with out any intervention.
for the HUB transport you must have another server to achieve high availability, so you can install the HUB role on a different server or add it to one of your existing servers.
Mohammad Saeed | MCSE 2003 | MCTS: Lync, OCS, Exchange -
Exchange Server 2010 - DAG - Physical and Virtual
Hi All,
we are trying to configure Exchange Server 2010 SP1 DAG with TWO Servers, we are getting the error sector size on log file header was mismatch
1) Physical Server - when we check the sector size on log file - 512 bytes (RAID5)
2) Virtual Server - when we check the sector size on log file - 4096 bytes
is there any workaround to solve this issue or do i need to re-install the physical server with 4096 sector size..
When i check the Volume details on both machine
1)
Bytes Per Sector : 512
Bytes Per Physical Sector : <Not Supported>
Bytes Per Cluster : 4096
Bytes Per FileRecord Segment : 1024
2)
Bytes Per Sector : 512
Bytes Per Physical Sector : 4096
Bytes Per Cluster : 4096
Bytes Per FileRecord Segment : 1024
MCITPHi Jared,
I've got a question regarding your answer.
We have an existing Exchange 2010 DAG configuration with 3 mailbox servers in NL and 3 in the UK.
2 for normal databases at each site and 1 for Archive databases at each site.
The current Mailbox servers for the Archive databases are Hyper V 2008 R2 based VM's with a passthrough for storing the databases.
We now want add 1 new Mailbox server for storing archive databases at each site and add them to the DAG.
Can we use Windows 2012 Hyper-V hosts and create the new VM's with 4k sectorsize vhdx files for the new mailbox servers ?
Regards
Misha Verhoeven -
Exchange Server 2010 DAG requirement
Hi i am configuring Exchange server 2010 with DAG. i read that Enterprise level OS must have needed for MS-Exchange DAG
but i have 4 Windows Server 2012 standard. can i configure my DAG setup on it?
It will be like 4 hyperv
DAG Node 1 – Windows Server 2012 standard.(MS-Exchange 2010)
DAG Node 2 – Windows Server 2012 standard.(MS-Exchange 2010)
Domain Controller – Windows Server 2012 standard.
FSW Server – Windows Server 2012 standard.
Is it right environment setup for DAG?Hello,
For Exchange 2010 DAG installation you need:
1. Windows 2012 Standard or Datacenter.
2. Windows 2008 R2 Enterprise or Datacenter.
Each node of DAG must have the same version of OS, both version and edition.
Your setup will be fully supported.
Hope it helps,
Adam
http://www.codetwo.com/?sts=3470 If this post helps resolve your issue, please click the 'Mark as Answer' or 'Helpful' button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster. -
Restoer exchange server 2010 DAG
hi
could you please let me know the prerequisite for restoration of exchange 2010 DAG which has broken one months ago.
<p>Don't forget to mark helpful or answer</p> <p>connect me :-</p> <p>http://in.linkedin.com/in/satya11</p> <p>http://facebook.com/satya.1000</p>Hi Satya,
If you are trying to recover a failed DAG member please check this
http://exchangeserverpro.com/exchange-recovery-failed-dag-member-exchange-server-2010/
If you are trying to recover Entire DAG Please check this
https://technet.microsoft.com/en-us/library/gg513521(v=exchg.141).aspx
Thanks, MAS
Please mark as helpful if you find my comment helpful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you. -
Moving the mailbox database copy from one exchange server to another exchange server 2010 DAG
Hello Team
is it possible to the move the passive copy of database and logs from one server to another exchange server in the same DAG with out removing and deleting the mailbox database copies in exchange 2010
normaly procedure is
Remove the mailbox database copies and manually delete the .edb files and logs from the physical location and re-add the mailbox database copy to the new server in the DAG.
is that any way to achieve to move the passive database copy to another exchange 2010 server in the same DAG ?From your note, you appear to have a two-member DAG (with a server hosting your active database, and a second hosting the passive copy), and you want to move your passive database copy from the current passive server to another. Your note
about what "the normal procedure is" isn't 100% correct - there are many ways to handle this task, and all can be considered "normal". Why not just add the third server to the DAG and
add a database copy on that third server? Once it is fully seeded, you can remove the current passive copy. This way, you never lose your redundancy.
Yes i can add the third and fourth serve in DAG , but i cannot add the mailbox database copies to the 3rd and 4th mailbox server in DAG as am using RTM version of exchange 2010 which is allowing to have only 5 database inclding mailbox datbase copies
and also currently my lab setup is two member dag (with a server hosting your active database,
and a second hosting the passive copy) in the same site named SITE A
and recently i have created new SITE B and included the 3rd and 4th DAG members in the same DAG
i want the mailbox database copies from the mailbox server database in SITE A to
Mailbox server database in SITE B as passive copy
That is why i want to move the mailbox database without deleting / removing it manually
Hope you understand my situation! -
DAG in exchange server 2010 across different sites
hello ;
I want to know the best way to implement DAG for exchange server 2010 across 2 sites in the same domain ,
I have 2 exchanger server in one site in DAG ,with 300 gb database size
but I want to implement exchange server 2010 in a new site within the same domain and this will be my 3rd exchange server and will be a member on my existing DAG in the head office
the new site is linked to my head office using ipvpn connection which is 6 mb , and ADC is there in the new site,
what is the best way to implement the new exchange server in the new site to join the existing DAG .
is there is any problem related to DAG in this scenario ?
what is the best way to implement this scenario ?
ThanksHi,
For each AD site, it is recommended to have at least there Exchange roles: CAS, HUB, and MBX roles.
Do you plan to have active users in this new site?
If there are active users in this new site, you can deploy a Three-Member DAG in two AD sites. However, it is recommended to deploy two DAGs in two AD sites and you should have at least two DAG members each AD site. This scenario, two witness servers in
separate site is necessary.
If the new site is only for DR purpose, you can install this new Exchange server and add it to DAG. After that, add database copy to this new server.
Besides that, here are two articles which may help you for your reference.
Database Availability Group Design Examples
http://technet.microsoft.com/en-us/library/dd979781(v=exchg.141).aspx
Understanding Database Availability Groups
http://technet.microsoft.com/en-us/library/dd979799(v=exchg.141).aspx
Hope this helps.
Best regards,
Belinda
Belinda Ma
TechNet Community Support -
Exchange server 2010 redundancy using static IPs in different sites
Dear All;
We are facing a problem in Exchange server 2010 which is that we need to provide redundancy for two different sites which contain the same exchange databases using DAG but the issue is that if the main exchange server fails, users from the internet will
not be able to access the server because the main static IP is in the main site ...
========================================
My question is how to provide redundancy using two Global IPs in two different sites, and is there any consequences of doing such a setup?
========================================Hi,
From your description, I would like to clarify the following things:
1. It is recommended to configure the IP Configuration for both the MAPI and Replication NIC on DAG nodes.
2. A site failure is managed differently from the types of failures that can cause a server or database failover. A site failure is considered to be a disaster recovery event, recovery should be manually performed and completed for the client service to
be restored and for the outage to end.
For more information, here is an article for your reference.
Switchovers and Failovers
http://technet.microsoft.com/en-us/library/dd298067(v=exchg.141).aspx
Besides, what do you mean by "global IPs"?
Hope it helps.
Best regards,
Amy
Amy Wang
TechNet Community Support -
Exchange server 2010 backup fails
My exchange server backup keep failing
the exchange server 2010 two node dag
netbackup 7.6
I have contacted Symantec support. They believed it's Exchange server problem as "Vssadin list writers"
show Microsoft Exchange writer Retryable error
Any help?Hi,
Please try to restart Information Store service for testing.
Also try to refer following blogs:
Troubleshooting Exchange 2007 VSS Backups
http://blogs.technet.com/b/exchange/archive/2008/08/25/3406172.aspx
Exchange and VSS -- My Exchange writer is in a failed retryable state
http://blogs.technet.com/b/timmcmic/archive/2012/03/11/exchange-and-vss-my-exchange-writer-is-in-a-failed-retryable-state.aspx
Thanks
Mavis Huang
TechNet Community Support -
Migrate from Exchange Server 2010 sp3 to 2013 sp1
I have one Exchange Server 2010 SP3 server (300 mailboxes) installed on Windows Server 2008 R2 SP1 with three major roles on it (CAS, MB and HT) - typical installation. Edge Transport server is not installed thus for controlling of mail flow
Symantec Messaging Gateway Virtual Appliance is used as Smart Host. UM server is not installed either. I set up test domain environment where I installed one domain controller (Windows Server 2008 R2 SP1) and one Exchange Server 2010 SP3 (Windows
Server 2008 R2 SP1) at first place and yesterday I did everything necessary to install Exchange Server 2013 SP1 on new test virtual server running Windows Server 2012 R2 which I successfully did.
Now in test domain I have two Exchange Servers (2010 SP3 and 2013 SP1). Is there any 100% reliable documentation with all actions that had to be taken in order to successfully migrate Exchange Server 2010 SP3 to 2013 SP1? I would want to know what
needs to be done not only for my scenario but also for other scenarios (DAG, CAS array, Edge, UM, multiple HT servers . . .) since I am interested in digging deep into Exchange Server 2013.
Hi BoxiKG,
In addition to the above mentioned, and this for your reference:
Upgrade from Exchange 2010 to Exchange 2013
http://technet.microsoft.com/en-us/library/jj898583(v=exchg.150).aspx
Best regards,
Eric -
NLB detected duplicate cluster subnets - Exchange Server 2010 SP3 CU5
Hi All,
I will explain the environment first, there are:
-Two HUB/CAS servers (WNLB)
--HUBCAS01
--HUBCAS02
-Two Mailbox servers (Failover Clustering)
--MAILBOX01
--MAILBOX02
*All servers are updated to Exchange Server 2010 SP3 CU5.
The issue is that from recently outlook users are disconnecting from the outlook and cannot be joined to the exchange server unless if I drainstop or stop HUBCAS01. Furthermore, if I start HUBCAS01 from WNLB it will work fine for sometimes yet it will randomly
disconnects outlook users from exchange again (For ex: next day morning).
So far when I search deeper in Event log, there is an warning event log:
Event ID 18: NLB cluster [192.168.*.*]: NLB detected duplicate cluster subnets. This may be due to network partitioning, which prevents NLB heartbeats of one or more hosts from reaching the other cluster hosts. Although NLB operations have resumed properly,
please investigate the cause of the network partitioning.
Now I hope you will provide this link to resolve this issue - http://technet.microsoft.com/en-us/library/cc726421(v=ws.10).aspx
But I don't think that this will resolve this issue, as i have tried this for 3 times, yet no luck. Please help me to resolve this issue permanently. Thanks in advance.Hi,
The issue is mainly related to the HUBCAS01 server. To deep investigate the issue, you need to take RPCTrace from the Outlook client and see the details. Even more, it’s better
to take a Network trace to check the details of the network.
Thanks,
Simon Wu
TechNet Community Support -
Upgrade directly from Exchange Server 2010 SP1 to Exchange Server 2010 SP3
Hi,
We have current setup with Exchange Server 2010 SP1 ( DAG & CAS Array with WNLB).
Can we upgrade directly from Exchange Server 2010 SP1 to
Exchange Server 2010 SP3 . ?
Thanks in Advanced.
Regards,AliHi Ali,
Yes, you can. Please upgrade your Exchange 2010 SP1 server roles in the following order: Client Access, Hub Transport, Unified Messaging, Mailbox, Edge Transport. What's more, please note that when you install a Service Pack or update rollup on a server
that's a DAG member, several services will be stopped during the installation, including all Exchange services and the Windows Cluster service.
For more information, here is a helpful article for your reference.
Installing Update Rollups on Database Availability Group Members
http://technet.microsoft.com/en-us/library/ee861125(v=exchg.141).aspx
Hope this can be helpful to you.
Best regards,
Amy Wang
TechNet Community Support -
Installing Update Rollup 7 for Exchange Server 2010 SP3
Hi,
I have 4 Exchange servers. Two CAS and two DAG. I am currently on Rollup 2 for Exchange Server 3010 SP 3. Can I install Update Rollup 7 for Exchange Server 2010 SP3 or do I need to install a previous one first?
Thannks!
Wave~ChaserHi,
When I try to install Exchange 2010 SP3 roll up 7, am getting the below error:
The upgrade cannot be installed by the Windows Installer service because the program to be upgraded may
be missing, or the upgrade may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade.
and please find below event log:
Product: Microsoft Exchange Server - Update '{A93DA06F-A5B8-4DF8-8B3F-B285E014C659}' could not be installed. Error code 1642. Windows Installer can create logs to help troubleshoot issues with installing software packages. Use the following link for instructions
on turning on logging support.
Can you please help me with this error.
Thanks -
Update Rollup 6/7 for Exchange Server 2010 SP2
Our config :
Version 14.2 (Build 247.5)
2 Mailbox servers (DAG), 2 CAS/HUB Servers using a NLB, 2 edge
my question is the following:
can i go directly to rullp 7 without installing 2,4, 5, 6 or I have to install all rollup ?
and what's the bests practices for installing rollup ?Hello,
You can install rollup 7 directly without installing rollup 2,4, 5, 6.
You should install rollup 7 on your Exchange 2010 server roles in the following order: Client Access/ Hub Transport ,Mailbox and Edge Transport.
Please refer to the following article to install rollup 7 on CAS Array Members. (Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does
not guarantee the accuracy of this information.)
http://exchangeserverpro.com/how-to-install-updates-on-exchange-server-2010-cas-arrays/
Please refer to the following steps to install rollup 7 on Database Availability Group Members.
=============================================================
1. Run the StartDagServerMaintenance.ps1 script on the server being updated.
2. Install the update rollup .
3. Run the StopDagServerMaintenance.ps1 script .
4. Re-balance the DAG, as needed .
Here is the article for your reference.
http://technet.microsoft.com/en-us/library/ee861125(v=exchg.141).aspx
If you have any feedback on our support, please click
here
Cara Chen
TechNet Community Support -
Hello,
I am a new IT Manager at this company and need assistance big time. Their environment looks as follows:
Server 1. Domain Controller Server (Windows Server 2008 R2 Standard) running active directory.
Server 2. Email Server (Windows Server 2008 R2 Standard) running Exchange Server 2010 .
* Note. No back ups to work with aside from whats mentioned below.
DC had a virus infection causing a lot of issues on the shared network drives 2 days ago locking up all the files with a crypto ransom virus. Running Avast suppressed the infection. Had to recover the file shares which luckily had a back up.
The issue is that the Exchange Server 2 post this lost connectivity with the AD Server 1. Exchange Server 2 when launching EMC could not launch the console stating the following:
"No Exchange servers are available in any Active Directory sites. You can’t connect to remote
Powershell on a computer that only has the Management Tools role installed."
Shortly after I found that it is possible the EMC launcher was corrupt and needed to be reinstalled following another blog post. I deleted the exchange management console.msc per instructions only to discover I couldnt relaunch it because there was
no way how. So I copied another msc file that happened to be on the DC Server 1 back to Exchange Server 2 and got it to launch again.
Another post said that it might be an issue with the Domain Account for the Computer, so to delete it in the AD Server 1 only to find that rejoining it from Exchange Server 2 using Computer>Properties> Chage Settings > Change is greyed out because
it is using the Certificate Authority Service.
I tried manually re-adding the computer in AD and modeling permissions after another server in group settings but no go. After this I was unable to login to the Exchange Server 2 with domain accounts but only local admin, receiving the following Alert:
"The Trust Relationship between this workstation and primary domain failed."
I tried running the Power Shell tools on Exchange Server 2 to rejoing and to reset passwords for domain accounts as noted in some other blogs but no luck as the Server 2 could not make the connection with Server1 or other errors it kept spitting out.
I also during the investigation found the DNS settings were all altered on both the Server 1 and Server 2 which I luckily was able to change back to original because of inventorying it in the beginning when I started.
I need help figuring out if I need to rejoin the Exchange Server 2 manually by disabling the Certificate Authority Service (or removing the CA as listed here:
https://social.technet.microsoft.com/Forums/exchange/en-US/fb23deab-0a12-410d-946c-517d5aea7fae/windows-server-2008-r2-with-certificate-authority-service-to-rejoin-domain?forum=winserversecurity
and getting exchange server to launch again. (Mind you I am relatively fresh to server managing) Please help E-Mail has been down for a whole day now!
MartyI recommend that you open a ticket with Microsoft Support before you break things more.
Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
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