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

I have two accounts, one is Office365 and one is private. That private one has had those problems and it seems to be 14.3.181.4006 version.

Also on Office365 I have Online Archive and one Shared mailbox and those are different version compared to my main Office365 mailbox. Main mailbox version is 15.1.31.0 and Online Archive and Shared mailboxes are 15.1.26.3.

Outlook version is 15.3 (141024) and OSX Yosemite is 10.10.1.

All is still working after the reinstall :)

Found a solution that seems to work for me.  I have Office for Mac 2011, version 14.4.6 and Yosemite 10.10.1 though I also experienced the "sync pending..." issue with Mavericks.  I found help in another forum that suggested creating a New Identity for the Microsoft Identity Database.  I found though that I simply needed to rebuild my Main Identity.  I did this yesterday and have had no "sync pending" hangs since then.  Here is the url to MS support for rebuilding your Main Identity.  http://support.microsoft.com/kb/2360509

Good Luck.

I find that MS support for Mac with outlook is at an all time low when I contacted them about this issue they said there was no information on this issue.  2 hours of my life I can't get back.

Hopefully they the release will come soon.

I had this issue too.  After 30 minutes on the phone to Microsoft help desk being passed around I got the line that it was caused by the version of exchange server that the effected account was hosted on.  Given the other posts in this conversation I am really skeptical this is the cause because the individual I spoke to was unable to tell me, which version would work apart from the latest version of Exchange. I have now uninstalled Outlook 365 and gone back to Outlook 2011. My concern is that this issue will persist when the Office 2015 for Mac comes out.

My Outlook 15 is still working after complete reinstall. So if you haven't tried it already, maybe it will help you too.