Attempting to set immutableId for user throws the error: “Set-MsolUser : Uniqueness violation. Property: SourceAnchor.”
Problem You’re attempting to use the Set-MsolUser cmdlet to configure the immutableId attribute for a user in Azure Active Directory but receive the following error: PS C:> Set-MsolUser -UserPrincipalName jsmith@contoso.com -ImmutableId “zxGeOiOTdkivMtgkOsuvKA==” Set-MsolUser : Uniqueness violation. Property: SourceAnchor. At line:1 char:1 + Set-MsolUser -UserPrincipalName jsmith@contoso.com