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EX2010 Edge Sync Failure

Posted on 2011-05-06
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Last Modified: 2012-05-11
EdgeSync service cannot connect to this subscription because of error "The LDAP server is unavailable"

I get this error when running test-edgesynchronization.  It *was* working, and suddenly failed.  No other symptoms, mail flow is fine.  In the Edge server's TMG logs, I see successful connections to the Edgesync / LDAPS ports.  No DNS lookup issues, HT can find the internal IP of the Edge server w/out issue and vice versa.

Running 2008 R2, TMG 2010, Exchange 2010 SP1.  Hub Transport / Mailbox Role server on internal network, Edge Transport server running in DMZ.
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Question by:NAMEWITHELD12
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by:NAMEWITHELD12
ID: 35729254
Sorry for the delay -- so I ran the Get-TransportServer command described in the first link, and the internaltransportcertificatethumbprint is different on the edge and hub transport servers.  Is this the desired configuration, or were they supposed to match?
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by:NAMEWITHELD12
ID: 35729329
Also, the command in the second link, "Get-Service *ADAM* | ft Di*,St* returns the following on my edge server:
DisplayName                                                                                                Status
-----------                                                                                                      ------
ISASTGCTRL                                                                                               Running
Microsoft Exchange ADAM                                                                         Running
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by:NAMEWITHELD12
ID: 35729401
Don't mean to spam, but here's some additional info:

I'm also getting error 1004, source MSExchange EdgeSync, on my Hub Transport server frequently.  It says "EdgeSync failed to confirm the credentials for replication account cn=ESRA.edgesvrname.hubtransportsvrname.0....etc. along w/ a password hash, and finally:

"Please make sure the Microsoft Exchange Credential service (MSExchangeEdgeCredential) is running properly on the subscription server."  

This service does not exist on the hub, but does exist on the edge, and is running.
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