User's manager object is always null when i try to retrieve a user. But i get "objectId", which is the corresponding manager(user) GUID. I can use this GUID to get Manager from API calls or from https://graphexplorer.cloudapp.net but not from Graph Client using C# (even with 2.1.0 version: https://www.nuget.org/packages/Microsoft.Azure.ActiveDirectory.GraphClient).
Can someone guide me on this? Thanks in advance.