Exchange 2003 Event ID 115

I am currently configuring my exchange server to be able to restore mailboxes using symantec 11d.

Now everthing is set up ok at the symantec end (settings for backup and restore) and seems to be at the exhcnage end (Recovery group and the fact the group has been flushed of data).

I have been looking at the logs on the exchange server and we are constantly getting errors that are returning the event ID 115 and the source Exchsync.

Any ideas?