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Questions tagged [dag]

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

51 questions
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Exchange 2013 Internal and External URLs with multiple servers and certificates

I'm building a lab with two Exchange 2013 Servers with different internal names and only one external URL, the naming schema is something like this: Internal Names: exchange1.local.example.com exchange2.local.example.com External…
Vinícius Ferrão
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Can you run CAU on an Exchange 2010 DAG cluster?

I've searched for this and I expected it to be a common topic, but I can't find any information on it. Given that the Exchange DAG is built on top of WCF, will CAU properly handle updating a DAG cluster? Specifically, will the Exchange servers be…
ElMalakai
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Any benefit and/or risk in enabling Jumbo Frames for the DAG replication network?

Exchange 2013 DAG, two nodes, a dedicated GBE network interface on each server for replication traffic, connected to a GBE switch, using a dedicated VLAN. Is there any benefit to Exchange replication traffic in enabling Ethernet Jumbo Frames both on…
Massimo
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Exchange 2010 DAG Failover Cluster DNS Issues

I am having an issues with my Exchange 2010 servers. I have two servers that have HUB/CAS/MAILBOX installed on them. They are configured to use DAG failover cluster. I expereienced an issue recently where the DNS entry for the DAG and the MAIL01…
user158678
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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 folder on a HUB/CAS server and the second mailbox…
Danilo Brambilla
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Exchange 2016 OWA URL switching to External URL

We are seeing an odd issue with a newly deployed Exchange 2016 in an Active-Active configuration. There are two sites, each with 2 Exchange servers. The DAG spans the 4 servers, with Active mailboxes at each site. We are using the Unbound namespace…
rawk_77
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Which server should be the Exchange 2013 DAG Witness Server?

Imagine a standard setup with an Active Directory Server, 4 Exchange servers ( 2 with CAS roles, and two with Mailbox roles) with load balancing and failover. This site talking about how putting the witness on the Domain Controller is bad…
kemicofa ghost
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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 2012 box. I would like to create a virtual machine…
Yanock Dupree
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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 it to a second site, I want to make sure all the…
makerofthings7
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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 it go across the WAN? If so should it be on a…
makerofthings7
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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 manually copy and paste the files necessary for…
greensmith
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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 for services like "Exchange Server RPC Client…
Duardon
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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, but I did it, and opened a case with Microsoft to…
KCotreau
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Exchange 2013 DAG - where to place witness server?

We have a setup with two Exchange 2013 servers (EX01 and EX02, every with all roles) in DAG on the single site. DAG is only for failover purposes. I'm planning to move one server to the second datacenter. Question: Where should i place the witness…
Denis
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LOG Space Issues -- Figuring Out the Disk Space needed for DAG CopyQueueLength

I have a DAG Database, DAG1, with 300000 CopyQueueLength. The Status for the copy is Failed and Suspended. In researching the problem I found that a reseed is needed for the database to get exchange copy up and running-- However I'm concerned about…
confoundr
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