The following accounts could not be found in Azure Active Directory, and have not been added: {0}. For users, please provide ...

The following accounts could not be found in Azure Active Directory, and have not been added: {0}. For users, please provide the UPN (User Principal Name) of the user account. This is typically the user's primary email address. For security groups, please provide the group's display name or UPN. If you're not sure what account information to use, please contact your Active Directory administrator.