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Exchange 2013 copy queue length problem

wayy2be
wayy2be asked
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Last Modified: 2014-07-28
I have an Exchange 2013 three node DAG. The servers are Mail 1, Mail 2 and Mail 3. We have several databases on Mail 1 and two are on Mail 3. Mail 2 is reporting a copy queue length of 400 and it is growing for the databases that are on Mail 3.

Does this indicate that the problem is on Mail 2 or Mail 3?  What causes a copy queue length?
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Sr. Enterprise Architect
Most Valuable Expert 2014
Commented:
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Author

Commented:
So would the problem be the passive copy on Mail 2. All the test check out ok.
Adam FarageSr. Enterprise Architect
Most Valuable Expert 2014

Commented:
Run the following:

Get-MailboxDatabaseCopyStatus | FL 

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Post it here..

Author

Commented:
Now we are seeing these errors from parent domain to child domain:

The call to Microsoft Exchange Active Directory Topology Service on server 'Topology ClientTcpEndpoint(localhost)' returned an error. No suitable domain controller was found in doamin 'xxx.com'

This error wqas received from a CAS server in the parent domain. The domain the error references is the child domain.

What can cause this?
Adam FarageSr. Enterprise Architect
Most Valuable Expert 2014

Commented:
I would check that the AD Sites and Services is set properly, and that domain controllers and a global catalog server are local to the site in which Exchange is located. Remember: the site and domain in which exchange resides in requires at least one domain controller and one global catalog server.

If this is fine, then two other things I would check:

- make sure audit logging and security logging permissions are set for the Exchange Servers AD Security Group (http://bloke.org/windows/exchange-2003-2007-2010-topology-discovery-failed-error-0x80040a02-dsc_e_no_suitable_cdc/#comment-3982)
- Make sure that you did not disable IPv6 on accident

Author

Commented:
What is best practice for Exchange Windows updates?  Do you have a Microsoft cited reference that I can show to our team?
Adam FarageSr. Enterprise Architect
Most Valuable Expert 2014

Commented:
Nothing. Just test them first, and then if all works well install them into production.