@Certificate([KeyLength];Certificate) does not work on the servers

Hello I am trying to find out what is the keylength of user certificate in order to setup up policy for specific users for keyrollover.

I found the the formula language @Certificate([KeyLength];Certificate) in the person document for the value Current key strength.

So I created a view to cateogorize by @Certificate([KeyLength];Certificate) on a local copy it works perfectly but on the server copy it does not categorize.

Has anyone seen this before ?