If the folder switching performance of the IMAP mailbox is still slow after applying this hotfix, it could be caused by one or more of the reasons below Note: This fix is also part of Service Pack 1 for Office 2010, so there is no need to apply this hotfix anymore. When synchronizing an IMAP account, Outlook could momentarily hangĪnd display “Not Responding” in the title bar for a few seconds. So, while this fix wasn’t focused on increasing Outlook’s IMAP performance, it does have this lucky side-effect. As Outlook checks for messages to update when switching folders and thus communicates with the IMAP server, applying this hotfix could also have a positive impact on the performance of that process. “Outlook 2010 stops responding when you configure an IMAP mode profile to connect to a large size mailbox.”Īfter further inquiry about this with Microsoft, this exact fix improves Outlook’s resiliency when it gets unexpected responses from the IMAP server. The December 2010 hotfix for Outlook 2010 contains several fixes including an IMAP related fix described as There is currently 1 hotfix available to improve Outlook’s resiliency when it comes to IMAP accounts which might improve your situation.Īside from this hotfix, there are also some other things that you can do to improve IMAP performance in general (this also applies to previous versions of Outlook).
While IMAP performance is slower than for POP3, Exchange or Hotmail account in Outlook, long hangs or even crashes of Outlook should not happen. Is there any way to speed up IMAP performance in Outlook 2010? Especially when switching folders, it takes quite a while for Outlook to become active again and shows "Not Responding" in the Title Bar. I upgraded to Outlook 2010 and I have the feeling that my IMAP account performance has become slower.
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