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Sunday April 23rd 2017

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Q&A Monday: Outlook 2003 problems with Exchange 2010

Question:

My company has recently upgraded our Exchange server to 2010, but I still have some users using Outlook 2003.  There are plans in the next 6 months to update these remaining users, but some of them are experiencing a problem.  The users have a bunch of shared calendars and are getting a connection issue, any advice?
Eric Davidson
Baltimore, MD
Answer:

The most typical problem I’ve seen with this is caused by the throttling police that is new in Exchange 2010.  When an Outlook 2003 client makes a connection to a shared calendar it can open two or more connections back to the server.  In Exchange 2010, this default throttling policy limits the machine to access 5 (or maybe 6) shared calendars.  Since you didn’t explain how many calendars, this may be the case.

The fix to this isn’t complicated, you just need to create a special throttling policy (Great Directions HERE and tells you how to map it to users) and map this new throttling policy to your 2003 users.

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