This is how to resolve the Windows showing Offline message that appears once in a while and doesn't allow Outlook to connect.
We do have a GPO for this but can also do manually.
Open GPEDIT.MSC >> Computer Configuration >>Administrative Templates>> Network >> Network connection Status Indicator >> Specify global DNS >> Enable
If the GPO is not applying correctly, you may need to rename the .POL file that contains policies.
Thanks,
Audel
Confirm Via Registry or run rsop from CMD as administrator