Cannot create the Endpoint Encryption client installers from Endpoint Encryption Manager


Article ID: 225017


Updated On:


Endpoint Encryption


When building the "SEE Client.msi" and "SEE Client_x64.msi" files from Symantec Endpoint Encryption Software Setup in Symantec Endpoint Encryption Manager, you may see an error that refers to The request failed with HTTP status 401: Unauthorized:


Windows loopback detection has been triggered. Windows loopback detection is enabled by default in Windows.


Symantec Endpoint Encryption 11.3 and above.


To disable loopback detection, please do the following.

First, check that loopback detection is enabled. Open a command prompt with local administrator rights and run this command. By default, the registry key should not be found:

C:\>reg query HKLM\SYSTEM\CurrentControlSet\Control\Lsa /v DisableLoopbackCheck

ERROR: The system was unable to find the specified registry key or value.

To enable loopback detection, run this command to add the DisableLoopbackCheck key with a value of 1:

C:\>reg add HKLM\SYSTEM\CurrentControlSet\Control\Lsa /v DisableLoopbackCheck /t REG_DWORD /d 1
The operation completed successfully.

To check the key has been added, run the reg query command again:

C:\>reg query HKLM\SYSTEM\CurrentControlSet\Control\Lsa /v DisableLoopbackCheck

  DisableLoopbackCheck    REG_DWORD    0x1

After creating the "SEE Client.msi" and "SEE Client_x64.msi" files, you can delete the DisableLoopbackCheck key:

C:\>reg delete HKLM\SYSTEM\CurrentControlSet\Control\Lsa /v DisableLoopbackCheck /f
The operation completed successfully.