One of our customer raised the below query:
There is a single Global Admin for their tenant that the organisation want to remove this account and there is no other Global Admins accounts in this Office 365 tenant.
They are unable to use Delegated Admin at this stage as they do not want to inform the existing global admin account that they are planning to remove this account.
What does the customer need to do to reclaim the tenant immediately once the the existing global admin user account has been removed without informing that account user?
Any help would be much appreciated.