Sorry if this is a really dumb question, but here goes. I run Office 365/Office 2011 on a Mac Mini. The only consistent problem I have is that when I leave the computer for, say, lunch, or to run errands or what have you, I almost always return to find that the Outlook window moves in such a way that to return it to center screen I have to shut it down and restart.

I run Outlook continuously, usually maximized. When I return to the computer after an hour or two, the window almost always has shrunken to a quarter of the screen and is locked in the top left of it, so far to the top right that I can't access the x - + buttons. When I drag the window to the middle of the screen, it immediately jumps back into the left corner.

Any idea what might be causing this to happen?

Thanks.

I am getting messages and calendar events from some domains that appear correctly in Outlook.com, but do not appear in my other clients.  This is a very consistent problem. The originating emails and calendar requests (I believe) are being hosted by an Office 365 account. 

 

The other clients I am using:

 

Windows Phone 8 (on a Lumia 1020)

Windows 8 Metro client (2 machines)

Windows 8/Outlook 2013 desktop client (2 machines)

 

How do I correct this, or is this a known bug?

 

Thank you!