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

I have the same issue, I ended up downgrading back to Outlook 2011.

I have the same issue, I ended up downgrading back to Outlook 2011.

Same issue here.  +1.  Says "Sync pending for this folder" but activity shows nothing is happening!

It's really bad and sad when Apple can produce an Exchange client that's more reliable than Microsoft.  Had nothing but trouble and had to give up on Outlook 2011, Outlook 2014 is even worse -- it won't even fetch email!  

If I restart Outlook the mail finally arrives.  But this is a disaster.  I can't afford to have email stop working in the middle of the day and suddenly have it wake up and send me with a barrage of emails from the last 3 hours that it only now decided to deliver!

Edit: Grumble... turning Apple Mail back on and deleting Outlook 2014....

I am also having this same problem.  It's a shame because the new Outlook looks nice and integrates into the notification bar.  In the meantime, I've switched back to Outlook 2011 and Apple's tools.

Hopefully somebody from MSFT chimes in soon.

Same issue for me as well. Very frustrating. Makes the new Outlook very painful to use.

I can confirm I am having the same issue - folders getting stuck at "Sync pending for this folder" and that it is ONLY happening within the Outlook 365 for Mac client.  My iPhone, iPad and webmail all work fine, the Mac client is what gets stuck.  And it just started happening last week - everything worked GREAT up until last wednesday 11/12.

PLEASE HELP!