It is not possible to use the GUI to do this because it cannot look up Azure AD user.
Start a CMD and use this command:
net localgroup administrators azuread\johndoe /add
A blog about some of the things I work with everyday
It is not possible to use the GUI to do this because it cannot look up Azure AD user.
Start a CMD and use this command:
net localgroup administrators azuread\johndoe /add