markets.books.microsoft

The Edge browser installs an expired certificate in the "Third-Party Root Certification" hive of the certificate store. 

Name and Issued By: "NO LIABILITY ACCEPTED, (c)97 Verisign, Inc.

Expiration Date:  1/7/2004

To see this:

Log in as administrator

Press Windows Key + R on your keyboard

Type "certmgr.msc"

Click on "Third-Party....." hive and click on the "Expiration Date" header to sort. Look for expired certificates. You will find the above.

Go ahead and delete all expired certificates (Right click and delete)

The Edge browser installs an expired certificate in the "Third-Party Root Certification" hive of the certificate store. 

Name and Issued By: "NO LIABILITY ACCEPTED, (c)97 Verisign, Inc.

Expiration Date:  1/7/2004

To see this:

Log in as administrator

Press Windows Key + R on your keyboard

Type "certmgr.msc"

Click on "Third-Party....." hive and click on the "Expiration Date" header to sort. Look for expired certificates. You will find the above.

Go ahead and delete all expired certificates (Right click and delete)

I have never used it either and when Bitdefender 2020 popped up a warning, and so I chose to block it. Hopefully that's the solution to the annoying repeats issue.

No, since it's the Microsoft Windows Store or Microsoft Edge attempting to communicate with the unsafe, unsupported Microsoft site, Microsoft should fix Microsoft's annoying, huge problem.  See the key there?  Microsoft.  Bitdefender is not in charge of Microsoft's apps or expired certs lol.

Just because edge is attempting to access the url doesn't mean that edge is initiating the command. It may be that a third party app is attempting to access the app and because edge is your default browser, then that's what it uses. It's bitdefenders job to recognise a dead link and suppress warnings from it. MS can't be expected to keep a cert updated to a dead site

No, Office 365 is initiating the command.  So it's STILL Microsoft's problem.  And ONLY Microsoft can fix this.  Edge isn't my default browser, but if I want to open Word 365 (e.g.) it opens in Edge, even though I want nothing to do with that browser.

Well we know where at least some of the requests come from, mine is when I log in to Office 365.  Why would that action require my computer to access books?  And yes, Microsoft CAN change their login procedures to stop them referencing their own outdated site.