“Access is denied” error while login to a Windows Server 2008 R2 SP1 with Citrix VDA7.15 CU installed

To fix this Access is denied error, add following registry and restart the server.

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlTerminal Server

Name: IgnoreRegUserConfigErrors

Type: REG_DWORD

Value: 1

HKLMSystemCurrentControlSetControlLsaKerberosParameters

Name: MaxTokenSize

Type: REG_DWORD

Value: 48000 (Decimal)