I was running Outlook 2013 for my Macbook Pro. I had to take my Macbook Pro in for repairs where the motherboard was replaced. Now Outlook 2013 for Mac launches in "Offline Mode" and will not come on line. I have tried to re-activate the Outlook installation and it will not re-activate. When doing so I get the following error:
"An unknown error has occurred, the error code is: -805240834"
I have also tried deactivating my installation in the Office 365 software center.