Error message for Office 365 applications and can’t open Outlook on MacBook Air

Hi

I've downloaded and activate my Office 365 subscription for 5 devices. It is working great on iPad Air. 

I'm having issues with a new MacBook Air (1.4GHz Intel Core i5 and 4GB memory) running OSX 10.9.4. This was a new MacBook so didn't have legacy office or other products that I thought may impact. It was a "clean" install. 

I have also updated to Office 14.4.4

Issue 1: When I open Excel, Powerpoint or Word it comes up with the following message; 

"There is a problem with the Office database

Office might be unable to access the database or the database file might be damages. etc...."

It then suggests that I rebuild the database via the Microsoft Database Utility. I've followed the steps and it hasn't worked. I can use these programs but I have encountered some issues with cut/paste functions with the clipboard. 

Issue 2: When I try to open Outlook I get the following message:

"Could not change to that Identity

An unknown error has occurred in Outlook"

When I clock on "OK" it takes me to a window to select an identity. Following the steps doesn't work.

I'd really appreciate any advice as to how to correct. 

thanks