Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello Eric,
Yes i did it like that and i got the error, i also found your solution but when i went to ECP, it had a lot less options, and i couldn't find the recipients, i cannot take a screenshot because it is working ok at the moment.
Maybe this will help others, what i did yesterday as a workaround is instead to give the first @onmicrosoft.com account another alias, i created a new user with @mydomain, gave it global administrator, took away the license from the first user and give it to new user.
Best regards