We had a significant event last week and many servers lost power, including 
some of our Exchange servers.  Everything came back up and things were 
normalized.  Since that time, though, we have a large population of users that 
are complaining about Outlook forgetting shortcuts to public folders (legacy 
calendars that have not been moved to shared mailboxes).  The internet suggests 
this is a common problem and the solution is generally to use "/resetnavpane" 
and/or delete the XML file.  Our folks have tried that to no avail, as well as 
a number of things such as rebuilding the profile from scratch, disabling 
plug-ins, safe mode, and even reinstalling Office.  What this amounts to is 
that the public folder doesn't show in the list when viewing calendars and 
taking action to make it reappear is lost when Outlook is closed and restarted. 
 The problem is similar to the one indicated in KB 2417084, except that OWA 
isn't involved here.  We have been on Exchange 2010 for quite a while and 
nobody had this issue prior to the outage, so it surely seems related.

Relevant details:

*         Exchange 2010 SP-2 RU-6

*         Outlook 2010 in cached mode on Windows 7

*         2 CAS servers in NLB

*         2 mailbox servers in DAG

*         Mailbox databases are running on "primary" server and public folder 
setting is pointing to PF database on same server

If anybody has any insight, it would be greatly appreciated.
Bill Mayo

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