So. Someone here set up a trial for O365 business, using companyname.onmicrosoft.com. That trial expired and when I called MS support, they said that that domain is no longer available. I cannot register a new account under that name though, so it appears to be taken. Is there any way to reuse it? We are are partner and need to set it up and then register our partner licenses.
or is companyname.onmicrosoft.com lost forever?