The return values of the SOAP API
I would like to know about the return values of the SOAP API.
For example, ISessionManagement.AddFolder Method has the Return Value, but IAccessManagement.GrantGroupAccessToFolder Method don't.
1. What happens if the process succeeds if the method have no the Return Value ? How I know the prosess succeed?
2. If the method with a Return Value fails, does an exception be returned?
3. If the method with no Return Value fails, does an exception be returned?