so no need to make any other changes in configurations , right?
bear in mind that the server that i want to offload is citrix for application acceleration (client to server ) and citrix uses bitmap .
will I have any addtional security from mcafee ips by decrypting such connection ? or just enabling the signatures related to citrix are enough to protect my server with out decryption ?
no further changes are necessary. You may want to keep an eye on sensor performance dashboards in the threat analyzer as the SSL decryption could add some additional load, but I wouldn't expect a lot from one server.
The ssl decryption will allow all HTTP based attacks that require clear text for detection to be used against the ssl server.