When launching an Office Suite file, Excel, Word, Access etc. the user gets the following pop up.
This is down to a recent issue with certificates that was resolved by the technical analysts.
The current work around is to launch Word or Excel and try top open a blank document.
At that point you will be prompted to Sign In.
Click the Sign In button and Enter your email address at the Activate Office screen. Click Next.
Click Yes to accept the information for the security certificate.
There will be another screen saying it is getting office ready for you.
Once done, close and then try to open the Office document, database etc.