Paul, could you query the Exchange server using excdsmc /excqueryserver ?
We're interested in the server version, what is running, and what logging is
enabled. Also, is this in a Microsoft Cluster Server environment?

Then, you could try running the backup with ntbackup.exe to see if it has
similar problems. Finally, you could schedule a recycle of the Exchange
Server and retry the backup.

Bob King     IBM Global Services
bobking AT us.ibm DOT com

From: Paul Bestow <paul.bestow AT PHOENIXSM DOT COM>@VM.MARIST.EDU>
      on 07/06/2000 05:09:01 AM
> Can anyone please help me with the following message:
>
> Tivoli Data Protection for Microsoft Exchange Server
> Command Line Interface - Version 1, Release 1, Level 1.0
> TSM API Version 3, Release 7, Level 2
> TSM Nodename: IEUKHS04_EXCH
>
> Starting a backup to the TSM server...
>
>    Exchange Server : IEUKHS04
>    Database : Information Store
>    Backup Type : Incremental
>
> Logging on to the TSM server...
>
> ACN3025E -- Backup error encountered.
> ACN4226E -- Exchange Error: ACN3516E -- An unknown Exchange API error has
> occurred.
>
> The above message doesn't really point to anything specific and we have
> tried various password resets, reinstall of client and TDP but still no joy.
> We also have a customer who is trying to do a restore after a new install of
> NT and installing Exchange in Recovery mode but when we try and restore the
> Information Store we get the same error.
>
> Paul