troubleshooting Question

Cannot open many mailboxes in Outlook simultaneously

Avatar of David Haycox
David HaycoxFlag for United Kingdom of Great Britain and Northern Ireland asked on
ExchangeOutlook
9 Comments1 Solution8693 ViewsLast Modified:
We are running a new, clean install of Exchange 2013.  One user has the requirement to be able to access all 50 other user mailboxes from a single Outlook client (I know this is not recommended, and why - but the user has a business need for this so if possible we'd like to make it happen).

The user sees this error message when trying to open some of the mailboxes, however:

"The set of folders cannot be opened. Your server administrator has limited the number of items you can open simultaneously. Try closing messages you have opened or removing attachments and images from unsent messages you are composing."

Previously (in Exchange 2007) we have worked around this by removing the MAPI session limit (http://technet.microsoft.com/en-us/library/dd159906(EXCHG.80).aspx) but I understand this is dealt with quite differently in Exchange 2013, with throttling.

I have followed the instructions to create and assign a new policy found here - https://migrationwiz.zendesk.com/entries/22713616-How-do-I-disable-the-Exchange-2013-throttling-policy- but this has had no effect.

Ignoring any potential performance issues (the server is hosted on Amazon Web Services and can be upgraded easily if more resources are required), how can we disable this limit, either for one or all users?

If possible step-by-step instructions would be great.  Thanks in advance for any assistance!
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 9 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 9 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros