A database availability group (DAG) is the base component of the high availability and site resilience and is a boundary for mailbox database replication.

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Exchange 2010 DAG and CAS Array online and fine but Outlook clients can't connect anymore

I come to you while in a bind : I have two Exchange 2010 SP3 servers installed in the same site, with a DAG working fine, database is mounted on server #1 (index is healthy). I configured a DNS Round ...
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33 views

MPLS outage on a 4 member DAG causes Exchange / Outlook to hang

We have two sites, with two servers in each one. DAC Mode (Datacenter Activation Mode) is enabled. One peculiar thing about this network is that the Primary and the Alternate shares are set to the ...
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51 views

What database am I seeding from in a stretched DAG?

I have a stretched DAG across 2 sites, with 4 copies. One of the remote copies failed, and I issued a re-seed operation with the remote&working copy as a source. Knowing this, I tried to work ...
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81 views

In Get-Mailbox, (Exchange 2010) why would the servername change and how can I correct it?

I have a 4 node DAG in 2 sites. All databases are mounted in Site 1. For some reason the "servername" property in "get-mailbox" is causing an issue with MAPI based software such as Goodlink. ...
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183 views

DAG: Exchange 2010 and 2013

I have a server 2012 box that is now running AD/GC/DC/DHCP/DNS/Hyper-V and exchange 2010. The domain/exchange started on a sbs 2003 box that I recently demoted after transferring all roles to the ...
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166 views

Exchange 2013 DAG Cluster Errors on non-owner node (eventid 1231)

We have a simple 2 node DAG setup with the nodes in 2 different sites. The DAG seems to be working fine, with mailbox databases moving back and forth between servers on-demand without issue. Seeding ...
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115 views

DFS-R not working on Server 2012 with Exchange DAG

We have 2 servers running a small network. The goal is to have the 2 servers as HA servers on a low budget. Therefore we deployed Windows Server 2012 and configured DFS-R which all worked fine. We ...
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41 views

When CopyQueueLength is high, how do I control which server is the source?

When I have a DAG with copies spread all over the world, and the initial seeding is already complete, how does Exchange control which server is used to fulfill the outstanding CopyQueueLength logs ...
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42 views

Is there any MSFT documentation that says RpcClientAccessServer should not be Internet-accessible?

This answer says that the RpcClientAccessServer can cause Outlook to "act slow" if it can be resolved from the Internet (assuming Outlook Anywhere is being used). Is there any documentation that ...
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77 views

What is the importance of “RpcClientAccessServer” on a database in an Active/Active stretched DAG?

I have two sites with a stretched DAG between them. By "sites" I mean two AD sites that correspond with different physical and network circuits. When I take an individual mailbox database and move ...
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221 views

Does “ThirdPartyReplication” in an Exchange DAG reduce overall bandwidth requirements? [closed]

I have to re-seed several databases and am looking into opportunities to reduce my bandwidth requirements. When I issue the command get-DatabaseAvailabilityGroup there is a feature called "Third ...
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491 views

Exchange, CAS, KEMP Load Balancer issue

We recently purchased 2 Kemp 2200 Load Balancers for our Exchange DAG (3 servers). We created the virtual service IP in KEMP that all the mail traffic will go to. We replaced the Exchange IP in the ...
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425 views

Exchange DAG fails over during backup

It seems like every night during our backup process, the Exchange DAG fails over. Is it possible to change a tolerance setting to prevent the DAG from unnecessarily failing over during backup times?
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260 views

Exchange 2010 two nodes disaster recovery

I currently have one on-premises Exchange 2010 Std server sitting on a Windows 2008 R2 Entreprise. The server is backed-up on tape and now I've been asked to add an off-site replication for businness ...
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2answers
1k views

Backup Exec-Should Exchange 2010 be backed up as DAG and individual servers?

I have two Exchange 2010 servers running a DAG. One server is onsite, the other is at a co-lo. I'm running Backup Exec 2012 to backup the DAG. My question is: Do i need to configure jobs to backup ...
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345 views

Resynchronizing after -catalogonly on failed exchange database copy

I've been experiencing problems with a exchange database after removing and readding it to a passive node. After a total reseed which also deleted the old files i ran into an error telling me that one ...
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1answer
300 views

Exchange 2010 with DAG - problems with communication

I've got 2 Exchange servers running HUB, CAS and MBX with DAG, 2 servers being Active Directory, 1 witness server and 1 TMG server. They are split evenly between 3 Hyper-V servers: Server 1 ...
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113 views

Exchange 2010 DAG DAC mode would prevent having some databases active on secondary site?

If I have a two nodes Exchange 2010 DAG stretched over two sites with DAC mode enabled and all databases active on primary site, I would still be able to activate some databases on the secondary site ...
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1k views

Exchange 2010 site resilience vs actice/passive stretched DAG configuration

Does it make sense to place DAG members in different sites when the witness server must stay in one of them? Think to this configuration: two DAG mailbox servers, one into primary site with witness ...
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1answer
144 views

Will Forefront 2010 Antispam/Antivirus protection work on all-in-one Exchange 2010 servers in DAG

We have 2 Exchange 2010 servers with every single role on each. Servers are in DAG mode and they have TMG 2010 as entry point and doing as load balancer. Can I install Forefront 2010 on both Exchange ...
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129 views

Exchange 2010 database FailedAndSuspended

Some of our Exchange databases regularly end up with a status of FailedAndSuspended. I think this is probably because the databases were set up with Circular Logging and the backup copy of the ...
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1answer
131 views

Is is a good idea to put SMTP Shadow replication on the same VLAN as DAG replication?

We have a VLAN for DAG replication, Recoverpoint (SQL Data), and right now SMTP Shadow replication is going over with the production traffic. Should shadow replication be limited to the site? Should ...
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1answer
635 views

Can I copy Ex2010 databases physically before replicating them via a DAG

We have two Exchange 2010 boxes and are attempting to use DAG (similar to this setup except we are less than 1 mile away from the remote office) However we were wondering if it is possible to ...
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2answers
679 views

Witness directory location in a two-server Exchange 2010 scenario with DAG

I am going setup a DAG in a brand new single-site two-server Exchange 2010 SP1 configuration, with both servers running CAS/HUB and MAILBOX roles and hardware-balanced CAS (no Edge roles nor Unified ...
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392 views

What GPO rights are required for an exchange service account?

I'm trying to create an exchange domain service account. I'd like to define the rights in a Group Policy Object. since this is for both a 2 node DAG, and 2 node CAS Array, I need to know the rights ...
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163 views

What topology to choose for 2 locations with 2x Exchange 2010 licenses (with more to be bought eventually?

We want to introduce Exchange 2010 in our organization. We have 2 locations: Main location has 2 ISP links used with one Forefront TMG 2010 (100 people on site) Second location has 1 ISP link with ...
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220 views

Exchange 2010 DAG

You may have just seen my other question here. One of the other things the client failed to tell me was that they also wanted a DAG between the U.S. and a site in Europe. I had never set up a DAG, ...