Recursos, configurações ou problemas adicionais não abordados nas categorias específicas do Microsoft Teams Gratuito
If you were able to create a new account using the same address, either the account was closed because you didn't log in for more than 2 years or you (or someone) changed the alias on the account.
Oh, and one possibility is you added a period to the address - Gmail ignores periods but other services see it as a unique address. For example, diane.p@ is the same account as dianep@ and d.i.a.n.e.p@
Enter your phone number here - https://go.microsoft.com/fwlink/?linkid=2273127 - and see if it finds other aliases linked to it. (It only gives the first 2 characters and the domain, not the full address.)