(401) Unauthorized error while accessing the Tenant details

Question

I am trying to access SharePoint tenant details and able to get an accessToken using Oauth2 flow.
then I used this token with CSOM to get tenant details as below.
but I get 401 error . is there any reason for this? .

using (var clientContext = new AuthenticationManager(accessTokenScureString)
         .GetContext("https://tenant-admin.sharepoint.com") )
         {
              Tenant tenant = new Tenant(clientContext);
              var x = tenant.GetAppCatalog();
         }

Decoded token which has AllSites.FullControl scope

    {     
         
          "scp": "AllSites.FullControl User.Read User.Read.All",               
          "sub": "NXPMNfjX2HEBjxSWBhSof.........",
          "tid": "23e45f37-1111-2222-a601-........"
    
     }  

Error

System.Net.WebException: 'The remote server returned an error: (401) Unauthorized.'  

Answer 1

In order to use CSOM Core with Sharepoint Online you will require Sites.FullControl.All. and User.Read.All.

Please refer the below microsoft docs for more details.

Grant Access Via Azure Ad

Please mark it as answer if solve you problem.