Today’s Tip… Leave an Office 365 or Azure organization
Did you know if you’re a quest user in another Azure Active Directory or Office 365 tenant, you can leave it any time?
Check out the following article to learn more…
https://docs.microsoft.com/en-us/azure/active-directory/b2b/leave-the-organization
Now you know!
However, if your user account is disabled in their organization, you won't be able to leave it. You will still have to contact one of their admins.