Error migrating from Google Apps, "Google.Apis.Requests.RequestError Not Authorized to access this resource/api" (4343791)

When migrating from Google Apps, you may experience an error like the following, which may only occur for a few users:

[1/3]Error detected, attempting retry 1 of 5 Google.Apis.Requests.RequestError Not Authorized to access this resource/api [403] Errors [ Message[Not Authorized to access this resource/api] Location[ - ] Reason[forbidden] Domain[global] ] (Google.Apis.Requests.RequestError Not Authorized to access this resource/api [403] Errors [ Message[Not Authorized to access this resource/api] Location[ - ] Reason[forbidden] Domain[global] ] )