Please explain how to create *free* Teams account with a business email address (not Office 365)

Hello ThereseSolimeno,

Let me rephrase.

• One can get Teams for free.
  • See https://www.microsoft.com/en-us/microsoft-365/microsoft-teams/free
• However, this is only working with MSN Adresses

First question:

Is it true that the free Teams account can only be used with an MSN account?

I presume the answer is yes.

Digging a bit more into the issue:

• If there is an attempt to get the free Teams with a non-MSN Emailaddress, there is always an error "<emailaddress> hasn't been added to your organization's directory. Contact your admin or try a different email."
• This is misleading at first view because it implies that the email domain has been setup already. This is not the case.

Second question:

It seems that all non-MSN addresses being tried lead to exactly that error message. 

Except if the domain used is actually registred in Office 365.

Is this assumption correct?

Going on:

• If the domain is not registered in Office 365, but it has been used to i.e. register a Volume License Account, one can "take over admin" as described in https://docs.microsoft.com/en-us/azure/active-directory/users-groups-roles/domains-admin-takeover
• Doing this actually creats a "registration" of that very domain in Office 365, albeit without licenses.
• Login in to portal.office.com with that just taken over admin account, allows me to add a new user. That user won't have any license, though.
• Registering that user now with the free Teams account (see link above), equips that login in the Office 365 portal with a so called "Microsoft Teams Exploratory" license

Question three:

It seems to me that this is the only way to get Teams "for free" for a non-MSN account. Is this correct?

Daniel