Outlook 2007/2010 Cached Mode Extremely Slow

Posted on 2012-08-30
Last Modified: 2012-09-04
We're running into a strange situation where Windows Outlook users are experiencing extremely slow performance in updating their inbox/calendar/anything in Outlook if running in cached mode.

Mobile devices, Mac / EWS clients, sending mail, non-cached mode inbox updates are all OK.

It took nearly 10 minutes to get past the initial configuring profile screen with the Outlook 2010 animation after recreating the profile, manually deleting the original OST.  It's now been more than 45 min and the OST is barely 4MB.

We're running in a 2007/2010 coexistence environment and this started happening this morning.
Question by:randy915
    LVL 17

    Expert Comment

    by:Lior Karasenti
    Try load Outlook in safe mode and see if there is any change

    maybe some add-on cause this
    LVL 1

    Author Comment

    Run "outlook /safe".

    For one of my small folders, it says at the bottom:
    "Updating Blah Blah Blah 208KB, 2 hours"
    LVL 1

    Accepted Solution

    Our active CCR node's store.exe had a high CPU usage.  After switching over to the passive node the issue was resolved.
    LVL 1

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