In order to setup an active conference room as a MTR (Microsoft Teams Room), you need to do the following:

1) Assign a Microsoft Teams Room license to the conference room via https://portal.office.com/adminportal

2) We need to allow the room the ability to sign in to Microsoft Teams. This requires setting a password on the room mailbox account. 

Open PowerShell and run the following commands (when prompted to sign in, use your M account). Items in bold italics should be changed to your conference room name and your desired password.

     Connect-ExchangeOnline 

     Set-Mailbox -Identity "Room Name" -EnableRoomMailboxAccount $true -RoomMailboxPassword (ConvertTo-SecureString -String 'RoomPassword' -AsPlainText -Force)

3) We also need to set the room mailbox account password to never expire. In order to do this, we need to log into Azure through PowerShell.

Run the following commands in PowerShell (when prompted to sign in, use your M account). The first half of the email address is the same as the one as the primary conference room mailbox email. The second half will always be @keminind.onmicrosoft.com

    Connect-AzureAD

     Set-AzureADUser -ObjectID yourconfemail@Keminind.onmicrosoft.com -PasswordPolicies DisablePasswordExpiration