Nov 03 2020 12:23 AM
Over time, you might join several Office 365 tenants as a guest. Some of those Azure AD guest accounts probably won’t be needed forever and you want to clean them up. This is easy for individuals to do through their MyAccount page, which might just be a page that they never knew existed.
https://office365itpros.com/2020/11/03/leave-microsoft-365-tenant-removing-account/