Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
As I had already said, it works everywhere else.
I have since got a response from Tech Support for the device with these instructions that did solve the problem. It is/was a setting in android. The following is the steps taken that corrected the problem:
Please follow the steps below to ensure that the app can run in the background:
1)Settings>apps¬ifications>advanced>special app access>battery optimization
—- then use the drop down to select all apps. Then don’t optimize.
2)Settings>Intelligent assistant>appblocker> Turn off appblocker
3)Settings>duraspeed(feature is deleted after android 10)
—- turn on for all apps that you want to run in the background.
Guide document :https://drive.google.com/file/d/1gQziEWyCZJF3y4sWX-U5YHoy1cTViyXs/view?usp=sharing
Hopefully this will assist anyone else with the same problem as my issue is now resolved.