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.
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Changing DAG network
We have a separate DAG replication network than the MAPI network for our exchange 2016 pair. We want to get rid of the separate DAG network and use the same MAPI network for replication.
How do we ...
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DAG: Configuration refresh failed with the following error: the metadata failed
I have two mailbox servers in exchange 2019 and I have installed DAG . I have set the static IP address for Dag and the process is ok ( Active and Passive Databases ) . But after failing one server ...
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DAG failover during the backup
I've 2 Windows servers R2 hosting Exchange 2013 in DAG. Every night during backup time ( 1:00 a.m) users notice unavailability of OWA (endless mailbox loading) or they can successfully login but can't ...
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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 ...
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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 ...
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Search on Exchange not working with EventID 1012: "Service at the endpoint address 'net.pipe://localhost/3867' is unavailable"
Overview
We have DAG with two nodes of Exchange 2016 CU12 running on up-to-date Windows Server 2016.
Search is failing on any mailbox residing in any database mounted on one of the nodes. Other ...
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Can I prevent Exchange from indexing during workhours?
We run 2 Exchange servers in a DAG environment. Both servers host 2 databases and have a passive copy of the opposite 2.
One of our Exchange servers is indexing a passive copy of the largest database,...
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Will Exchange DAG copy unstable/corrupt database changes?
We just set up a DAG environment between 2 Exchange Servers.
One of the servers hosts the active databases and one hosts passive copies (no lagtime).
I think this will work perfectly in the case of ...
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Emails sent from Server1 reaches the destination from Server 2
Question
Outbound emails sent through EXCH-S01 or EXCH-S02 are always routed to EXCH-S02 before leaving the organization network in Exchange 2010 DAG. Why?
Configuration
This is a simple DAG with ...
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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 ...
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Exchange DAG 2013 force node to keep mounted database
Please do help us with this critical issue.
We have 2 node DAG, one of the MB server has issues on the physical host itself and keeps hanging. All the databases has copies on 2 MB servers. But when ...
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Exchange 2013 DAG over 2 Subnets replication failure
I have 2 Exchange 2013 Standard servers on two different subnets. One is on our local network and the 2nd is on our Cloud provided by our ISP. Adding the 2nd server to DAG went well and seeding the ...
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Exchange Server 2013, Database Availability Groups, NAT, and High Availability
Dilemma here
I want a high availability/failover solution for people accessing outlook anywhere or exchange from outside the network.
I have 2 exchange servers (EXCH1 and EXCH2) that have Exchange ...
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Exchange 2013 DAG Cluster Unable to add second sever
I have two servers (EXCH1 and EXCH2) running Exchange Server 2013 Standard, and a third file server that is a DAG Witness.
The first server is a Windows Server 2012 R2 Standard machine and the ...
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Exchange 2010 - 2 server DAG (all roles)
At the moment I have a single Exchange 2010 server with all roles (MB, HT & CAS).
I am looking to improve our email recovery time in the event of a disaster. I understand that true HA with site ...
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Exchange Server 2013 Content Indexes Failed in a DAG that spans a WAN
We recently were the victim of database corruption in one of our mailbox servers. In our environment we have two mailbox servers and two CAS servers. One Mailbox Server and one CAS Server is in our ...
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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 ...
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Backing up 2 Exchange Servers in a DAG
A little explanation of our setup..
We have an Exchange 2013 in our main site with 1 Database Active on it and then we have a DR Exchange 2013 with the same Database but as passive. Users are ...
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Users connecting to the DR Exchange 2013
Basically we have a Main Site Exchange 2013 with CAS and Mailbox Roles and supposedly all users connect to this exchange from their Outlook.
Now we installed an other Exchange 2013 at the DR site.. ...
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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
...
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Can I use database portability to convert an IP -less DAG to a standard DAG in Exchange 2013?
Exchange 2013 allows for an "IP-less" DAG, something that exists in Windows 2012R2. This is becoming a bit of an issue as a lot of software doesn't support it.
I want to take my 3 node DAG and ...
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Exchange 2013 DAG Replication
I'm in the process of setting up a 2nd Exchange server 2013 and then Create a DAG for disaster recovery purposes. At the moment we have one CAS/Mailbox Exchange 2013 Server installed on the main site ...
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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 ...
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Error while creating backup database copy of Exchange 2013 on DAG.
Created a DAG for Exchange 2013 between two mailbox servers. Server 1 is main , Server 2 is connected via Cisco VPN client to Server 1 network. Trying to start the seeding process to create a backup ...
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Add a second Exchange 2010 server to enable upgrade to SP3
One of our customers has 1 (virtual) Windows Server 2008-R2 Enterprise which is a root DC with Exchange 2010 SP1. They want to upgrade Exchange to SP3 so they can easily migrate to Office 365.
Since ...
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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 ...
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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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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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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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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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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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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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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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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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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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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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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 ...
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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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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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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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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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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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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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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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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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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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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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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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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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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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