XFOR: How to Remove a Corrupted DXA Message from Exchange MTA

• Microsoft Exchange Server, versions 5.5, 4.0, 5.0

SUMMARY

Sometimes a directory synchronization (dirsync) message becomes corrupted and cannot be removed from the message transfer agent (MTA) queue, making the dirsync agent (DXA) unable to receive further requestor updates. In order to fix this problem, you need to either find and remove the .dat file corresponding to the dirysnc message, or remove the DXA queue and rebuild it.

MORE INFORMATION

In order fix this problem

1. Stop the Exchange Server MTA and run MTACHECK with the following command:

   MTACHECK /V /F logfile.txt

   This will generate a log file and allow you to determine which queue the DXA owns, and which objects (.dat files) are associated with those queues.



2. Look in the logfile for an entry that looks like this:

   
      /O=ORG/OU=SITE/CN=CONFIGURATION/CN=SERVER/CN=MICROSOFT DXA (id 01000045) 




3. Match that ID (01000045) with a Checking object line to determine which .dat file is corrupt. For example:

   
         Checking object 0350000FB -OK, on queue 01000045 

   In this case, the file will be Exchsrvr\MTADATA\DB50000FB.dat. Find the entry that is closest to the time and date that the DXA stopped receiving dirsync messages and rename the file to *.tmp.



4. Run MTACHECK and start the Microsoft Exchange MTA.



5. Do a manual dirsync to see if that fixed the problem; if not, remove the next closest .dat file (associated with the DXA) and try again.

• Delete the actual DXA .dat file and run MTACHECK twice. This will force the deletion of all dirsync messages and re-create a new DXA queue.
  
  -OR-



• Use the latest version of MTACHECK and run it with the following command:

  MTACHECK /RD

  This will remove all dirsync messages automatically.

Additional query words:

Keywords : kbtshoot kbusage XFOR exc4 exc5 exc55
Version : winnt:4.0,5.0,5.5
Platform : winnt
Issue type : kbprb