I have discovered that the OUTLOOK that I was looking at is the new Microsoft 365 OUTLOOK .
I have 2 DELL laptops running Windows 10 and Office 365.
I recently renewed my Office 365 subscription to the new Microsoft 365 on one of the laptops (A).
The other laptop (B) continues to run OUTLOOK normally Send/Receive.
Laptop (A) can see my OUTLOOK e-mails in the .pst data file in the old format until the Microsoft 365 change on Jan 11th.
Since then Send/Receive does not run. I know the ISP has my e-mails that I see when accessing the new OUTLOOK in Microsoft 365.
I don't know where to begin to try to determine the cause of this problem.
Any suggestions will be greatly appreciated.
Tom