Defeated by Unexpected Transaction Log File growth

Applies to Exchange 2003, concepts apply to 2007 as well.  I’ve bumped into a few cases recently where the customer had unexpected transaction log file growth that caused the server to dismount a storage group due to lack of disk space.  In this post I’ll attempted to explain why this occurs, how to troubleshoot it,…


How to get rid of 9646 events

Applies to Exchange 2003 Event Type: Error Event Source: MSExchangeIS Event Category: General Event ID: 9646 Description: Mapi session “/o=<org>/ou=First Administrative Group/cn=Recipients/cn=<userName>” exceeded the maximum of 32 objects of type “session”. Seen these in your environment?  Sometimes they are caused by desktop search engines opening too many MAPI sessions, other times they are because your…


Repeating 623 version store error.

Applies to Exchange 2003 I had a case a couple weeks ago I thought I’d write about.  What was happening is the Version Store would run out of memory and a 623 error would throw.  Version Store buckets allocated would climb from 4 to over 2000 in less than 5 minutes.  The store would then…


How to fix smashed schema in Exchange 2003

Dan and I and some other engineers wrote up a blog post you can find here on how to recover from a smashes schema scenario on your Exchange Servers.   It’s pretty succinct so I don’t have anything to add to it, it’s an interesting read though.