The advanced user management in Miro allows account Admins to easily filter and manage all Teams and Team users in one place and set up Teams’ permissions.
To add users to a Team click the Add team members link.
Account Admins can either add new Team members by themselves in the Team settings or grant Team Admins or All members with the invitation rights.
Team invitations settings
To set up the access, go to the Permissions field of a particular Team. Once you grant access, users will see the Add team members link (as above) in their Team settings.