Exchange Disclaimer Hnd Transport Agent Reviews

Hello, Like you, I used the built-in tools (transport rules) MS-Exchange 2010 Server to add a signature and disclaimer, but insertion can only be done by the beginning or end of message. I tested your solution works but insertion can only be done by the beginning or end of the message also, and active directory attributes can not be inserted. Is it normal or are there any parametrage to do? Best Regards