Hello All
im facing this issue after migrating one of our users to office 365.
Unable to update this object in Azure Active Directory, because the attribute [ShadowCommonName], in the local Directory exceeds the maximum allowed length. If you want to update, reduce the length in the local directory services, and then try again.
i have contacted office 365 support but they said its not from their side and it is better to post the question here.