Hi all. I'm on an Office 365 for Small Business subscription and recently upgraded to Outlook for Mac 15.3 (141024). The issue I have now, which never occurred previously, is that Outlook will quite often get stuck with message "Sync pending for this folder". That is on my Inbox, and it prevents new emails from showing up. The emails will pop up on my phone instantly, but Outlook will not show them. I have to close and restart Outlook for Mac before the new emails show up.
This occurs quite frequently, about 3-4 times per day and the only fix I've found so far is to restart Outlook. My inbox usually contains less than 50 emails and no folders. I have tried the recommended trick of emptying the cache but that didn't fix the problem.