Hi, i´ve got the same problema, but the AD user that i´m using is shorter than 20 characters. Here the log:
VMware.Sim.CommonLib.Exception.InvalidParameterException: UPN username format is not supported.
at VMware.Sim.ServiceCore.SimServiceApiVal.ValidateVcConfigEntry(VcConfigEntry vcConfigEntry)
at VMware.Sim.ServiceCore.SimServiceApiVal.AddVcConfig(VcConfigEntry vcConfigEntry)
at VMware.Sim.ServiceCore.SimServiceApiImpl.AddVcConfig(VcConfigEntry vcConfigEntry), Machine Name: VCENTER, Timestamp: 9/20/2013 5:47:17 PM, App Domain Name: SviWebService.exe, Thread Identity: , Windows Identity: OL\vcuser, OS Version: Microsoft Windows NT 6.1.7601 Service Pack 1, reason: ValidationFailure, param: vcConfigEntry.LogonUser
2013-09-20 14:48:09,988 | 25 | INFO | ServiceCore.LockManager.LockManager - A lock is requested for AdConfigEntry with id: 29ad95ea-3fc7-4b0f-9df4-0f4d87d2cf50
2013-09-20 14:48:10,066 | 25 | INFO | ServiceCore.LockManager.LockManager - A release is requested for AdConfigEntry with id: 29ad95ea-3fc7-4b0f-9df4-0f4d87d2cf50
whichmay be the problem?