We recently switched over to MS Office 365. We have users on Teams.
The domain for everything except Sharepoint appears to be correct. Unfortunately the domain for Sharepoint has <domainname>bi.com. The letters "bi" are appended to our domain. (Note this is also our domain but it is going away.)
Before we get too deep into document sharing, we need to have Sharepoint use the correct domain.
How do we fix this? Rackspace told us we'd have to buy all new licenses. This makes no sense since the issue is that it was set up incorrectly in the first place. (by Rackspace.)
Please we're not getting the support we need on this from our MS partner so if anyone can provide some guidance on making this change I'd be very grateful.

