Citrix XenApp or XenDesktop shows a black or blue screen during logon

Version 1

    Verified Product Versions

    Environment Manager 8.6Environment Manager 8.5


    During Logon to a XenApp published desktop or XenDesktop you do not see Windows logon progress messages (like EM8.5 messages).  Instead a Blue or Black screen is visible during this time.


    By default, Citrix disable the Windows logon messages as described in following Citrix KB Article:

    This issue may also be seen on older Operating Systems, such as Server 2003 / Windows XP, due to Microsoft Group Policy Settings, "DisableStatusMessages" and "verbosestatus". See the following for more information:

    Add or set the following registry key to resolve the issue:

    Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\Logon
    Name: DisableStatus
    Type: REG_DWORD
    Value: 00000001