Windows 10 Mail Randomly Deleting E-Mail Accounts

I have 4 computers running Windows 10.

On only 1 of them does the following problem occur. Version 1909 OS Build 18363.900

I set up Windows 10 Mail with about 9 different E-mail Account addresses including 3 Outlook accounts (1 @Outlook.com and 2 @ hotmail.co.uk).

They work perfectly for a week or so and then for no reason I can see all the accounts except the 3 Outlook accounts suddenly disappear (get deleted) and they need to be set up again. This can happen in the middle of a computer session without, apparently, any updates happening.

I have run System File Checker on a number of occasions with no problems being detected !

Any help solving this problem would be appreciated.

I'd scan for viruses and pay close attention to who uses your computer.

Virus scan done frequently and I am the sole user.

In fact I have opened up Windows 10 Mail in the past and seen the accounts disappear on the screen !

This issue appears to have resolved itself with updates !