Office 365 – Domain already in use…

I have seen this thrown around a few times, if your domain has been used elsewhere (perhaps a trial, or a Guest in another tenant) there is no easy way to get MS to remove it.I came over this “try and see” method and it seemed to have worked on a couple of clients I have worked on.

• Get a trial with your domain into the 365 stack – try a PowerBI one for ease here: http://go.microsoft.com/fwlink/?LinkId=616218
  

• Log in to the portal, Admin tile and it should start a process for becoming the administrator of the associated tenant.
  

• Create DNS entry for proof of ownership
  

• Change any additional accounts to the default onmicrosoft tenant
  

• Do a shake, dance and log off and back on and remove the domain
  

• Give it time, Microsoft Time / Windows time to expire
  

• Re-add to the tenant it should be used.
  

This has been floating around for a while but does work in most cases.