Skip to main content

Unplanned Outage: Exchange Email and Calendar

Last Updated:
2011-11-01 00:00:00
Event:
2011-10-31 00:00:00
Status:
Closed
Brief Description:
Exchange
User Impact:
N/A
Workaround:
There is no workaround for this issue
Current Status:
N/A
Services Affected:
Full Description:
The Exchange performance problems the morning of October 31 have been traced to Outlook 2007/2010 on Windows attempting to connect to all mailboxes to which each user had access. Individuals may need to re-add the Exchange Group Accounts they want to see in Outlook (see http://www.cit.cornell.edu/services/ega/howto/config.cfm).



Timeline of Changes

Description Current Status Date Time
We are currently investigating this problem and will notify you with updates on this situation. We are currently investigating this problem and will notify you with updates on this situation. 2011-10-31 00:00:00
Some Exchange users are experiencing slow Exchange response or difficulty connecting to Exchange. One of the mailbox servers is experiencing a heavy load spike at this time. Exchange admins are working on determining the source of the load and taking measures to address it. Some Exchange users are experiencing slow Exchange response or difficulty connecting to Exchange. One of the mailbox servers is experiencing a heavy load spike at this time. Exchange admins are working on determining the source of the load and taking measures to address it. 2011-10-31 00:00:00
The load spike has abated this morning. Exchange staff are continuing to work on monitoring the system and addressing the root cause The load spike has abated this morning. Exchange staff are continuing to work on monitoring the system and addressing the root cause 2011-10-31 00:00:00
The performance problems are believed to be primarily caused by a feature introduced by Microsoft in Exchange Server 2010 SP 2. The feature's effects were not apparent until a script for Exchange Group Accounts was run the weekend of October 29. \n\nThe feature causes Outlook to automount all mailboxes to which an individual has full access. The result was that start-up time for Outlook may have taken several minutes for some individuals. When the automounting was stopped, the accounts appeared to disappear from Outlook. Re-adding the affected accounts resolves the issue for individuals.\n\nCIT is adjusting the scripts for Exchange Group Accounts and filing an issue report with Microsoft. The performance problems are believed to be primarily caused by a feature introduced by Microsoft in Exchange Server 2010 SP 2. The feature's effects were not apparent until a script for Exchange Group Accounts was run the weekend of October 29. \n\nThe feature causes Outlook to automount all mailboxes to which an individual has full access. The result was that start-up time for Outlook may have taken several minutes for some individuals. When the automounting was stopped, the accounts appeared to disappear from Outlook. Re-adding the affected accounts resolves the issue for individuals.\n\nCIT is adjusting the scripts for Exchange Group Accounts and filing an issue report with Microsoft. 2011-10-31 00:00:00