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office365 + connector synronization hang

Posted: Tue Feb 04, 2020 11:42 am
by mkocajk
Recently we migrated from Zimbra Open Source to Network edition and with Zimbra Desktop being EOLed we decided to switch to Outlook + Outlook Connector.

Our infrastructure is Ubuntu 14.04.6 x64 (we plan to upgrade it soon) with Zimbra 8.8.15_GA_3894.NETWORK and on desktop side, Windows 10 + Outlook

I have a relatively big mailbox (approx. 35 GB) with lot of folders and subfolders.
Some of the emails are big (over 50MB) and Outlook/Outlook Connector is unable to process them - it just hangs on synchronization , eventually hanging up Outlook process that needs to be killed.

I believe it is due to big emails (over 50MB) that I have in some folders. When I removed some that were no longer needed, the process continued, but there are emails that I would like to keep - and I would like to avoid having my outlook crash in the future when I receive something big.

Is there some solution to help outlook + outlook connector tandem handle big messages?