This should be the object id or sid of the user from the source AD or AAD provider. Example: d47d025a-ce2f-4a79-8618-e8862ade30dd Azure Devops will communicate with the source provider to fill all other fields on creation.
OptionalstorageStorage key should not be specified in case of updating user
Use this type to update an existing user using the OriginID as a reference to an existing user from an external AD or AAD backed provider. This is the subset of GraphUser fields required for creation of a GraphUser for the AD and AAD use case when looking up the user by its unique ID in the backing provider.