Howto remove one account under email&accounts

Good evening,

I have this problem I do not know how I was able to do that. The majot outcome I see is Microsoft Store not working, neither to update existing apps neither buying and downloading new ones.

I have a laptop I access to using my personal account I used when I accessed the first time, using my personal email (******@yyyyyy.it).

Then I worked as a free lance using this laptop and having access to Customers's mail & office with ******@zzzzzz.it.

Now, I understood the problem: two accounts in email&accounts (******@yyyyyy.it and ******@zzzzzz.it)

If I click on manage below ******@zzzzzz.it, I come to the problem: I'm directly connected with account "name surname-Ext" linked to ******@yyyyyy.it as a work account.

I surely made a mistake in the past creating this account under an organization.

Is there any suggestion how to remove this "name surname-Ext" from that organization?

Or, is there any suggestion to have only my personal account as email&accounts in Windows?

Thanks in advance

Alex

======================

Addition @19.46CET

I understood that one azure directory yyyyyy.it exists in the cloud, I'm not able to identify the administrator to ask to be removed.