Citrix Receiver - Security Warning - How to get it back?

Question

When I launch a Citrix application, I get this warning message. However, I accidently clicked on "Block access" and "Do not ask me again for this site".

How do I go back to set this to "Permit use"? In fact, where is this setting stored? Registry perhaps?

Answer 1

Edit Registry. "Client Selective Trust"

Have a look at the registry. The settings are saved there for each site.

Sites are identified by random-ish UUID-named key. But the clear text description is saved in a sub-key.

Example from my system:

HKCU\SOFTWARE\Citrix\ICA Client\Client Selective Trust\{1D4C92B7-E57E-734E-DECC-215A1C98766D}
HKCU\SOFTWARE\Citrix\ICA Client\Client Selective Trust\{1D4C92B7-E57E-734E-DECC-215A1C98766D}\RegionName\(Default) -> data "10.40.1.12"

So now I know that the settings below {1D4C92B7-E57E-734E-DECC-215A1C98766D} apply to the server identified as 10.40.1.12.

Try to find the UUID-key you want, then export, then delete the key. Then try if the prompt comes back.

Further reading

• Ingmar Verheij, 2012-06-26, “Citrix Receiver – Security Warning” explained and demystified (Archived here.)