I have a user in CRM 2011 having System Administrator security role (image), when I use that user in my Web Service to retrieve Account
entity this error comes up
Principal user (Id=927fbba4-d61a-e311-992b-000c295c9030, type=8) is missing
prvReadAccount privilege (Id=886b280c-6396-4d56-a0a3-2c1b0a50ceb0)