The subscription service for Microsoft Office has not been able to connect to the Internet for an extended period of time ...

The subscription service for Microsoft Office has not been able to connect to the Internet for an extended period of time and was unable to verify your subscription. As a result, the editing functionality in your Office product has been disabled.

If you have established an internet connection and would like to try again now, click Retry. Otherwise, click Cancel and connect this computer to the internet as soon as possible to verify your subscription.