All users not recieving Signature update

Hi,

I am updating email signature through policy. We have an script assigned in the policy. Problem with this is some users are getting proper signature in Outlook but few users are not getting all the fields. In AD all information is filled for all the users. If i create new users with all the required info they are also not getting full signature update.

Is there anything i am missing in policy.

I wil be thankfull to all the suggestion where to look for.

Thanks & Regards
Siddh