So after creating a new database and moving all users my Event ID 629's are back, at least this time I have an idea of the cause. We have a MS CRM V4 server here and our Outlook 2007 users have the CRM Outlook Plugin Installed. Ocasionally when our CRM Admin publishes changes to CRM, it hangs up. The fix for CRM is to do an IISReset. Once this is done CRM is fine. However, I noticed my log drive on the Exchange 2010 SP1 server begins to fill rapidly. I then ran EXmon to see who was hitting the server. I find one user who has two sessons, one for Outlook, one for the CRM client Plugin. I end task his Outlook.exe and the log growth stops. Of course this was after it dropped 5GB of junk into the database. The next day I start getting the 629's in my app log. Anyone know what the CRM client is dropping in the database that can cause logs to grow that fast? I have no idea. I cant keep moving users to a new database every time this happens. What are Unversioned Deletes? Is there some retension period I can change to purge these? Or is there some way to determine what user they are associated with so I can delete the account. I am desperate for an answer here. Thanks!

Here is the Event Log: Information Store (4776) CGEmployees: Database 'J:\CGEmployees\CGEmployees.edb': While attempting to move to the next or previous node in a B-Tree, the database engine skipped over 43364 non-visible nodes in 129 pages. In addition, since this message was last reported 1 hours ago, 0 other incidents of excessive non-visible nodes were encountered (a total of 0 nodes in 0 pages were skipped) during navigation in this B-Tree. It is likely that these non-visible nodes are nodes which have been marked for deletion but which are yet to be purged. The database may benefit from widening the online maintenance window during off-peak hours in order to purge such nodes and reclaim their space. If this message persists, offline defragmentation may be run to remove all nodes which have been marked for deletion but have yet to be purged from the database. Name: MSysObjects Owning Table: MSysObjects ObjectId: 3 PgnoRoot: 24 Type: 2 Unversioned Deletes: 43364 Uncommitted Deletes: 0 Committed Deletes: 0 Non-Visible Inserts: 0 For more information, click http://www.microsoft.com/contentredirect.asp.

Do you mean event id 623 or 629? 623's indicate you are experiencing log stalls and your version store is getting backed up. Third party tools and clients can do this causing looping action and generating the massive logs. I don't have experience with CRM plug in, but I would at least try to uninstall it from these two clients if it's always occuring with them and reinstall it.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Definite 629. Source ESE Warning, Category: Performance