Outlook for Mac 15.3 (Outlook 365) gets hung up on Sync Pending

HBR -- I found a solution to the sync errors:  go to your sent items and locate the record that's generating the error and delete it.  That worked for me.

I have exactly the same problem. It appeared to start when I accepted the upgrade to Outlook 15.6. Have done a complete fresh install and still have the same issues.

Outlook 2013 works fine using VMWare.

Has anyone else linked the problem to the 15.6 update?

Yes! I'm having the exact same issues and now, with 15.6, I'm having a great deal of trouble downloading attachments automatically or otherwise.  I'm using Exchange.  

Microsoft at its worst...

Thanks for advise. The sync errors is primarily from shared calendar events in my team, so cant delete those.

I "upgraded" and still same problem - the dreaded "Sync Pending for this folder" remains. I have a msn account.

I've long given up on Outlook, and subscribe to this thread to see merely how many people have to say something for Microsoft to actually do something, or even acknowledge a problem. 

And by the way - what is with outlook for mac always asking whether i want to re-enter my password when not connected to the internet (when i'm commuting for example). Absolutely infuriating. why doesn't it just realise i'm offline? Grrrr....

Hello

I've got access to several proxy servers and noticed that the behaviour is different depending on the proxy server I use. This leads me to believe that it's related to the connectivity. Not sure if the proxy is caching something it perhaps shouldn't, or whether certificates are being messed around. Hope this helps somebody.

Y