1.) What will be the advantage and disadvantages of URL redirectionless posturing ?
-One advantage would be not having the portal page pop up/appear when clients connect. A major disadvantage IMO would be needing to have your clients fully provisioned and ready to onboard and proceed through posture assessment (AnyConnect modules installed, proper ise posture module config files deployed, etc. via SCCM or another way). I think this design decision comes down to requirements.
2.) What is the role of Client provisioning port in redirectionless posturing ?
-Pending clients have proper modules + files already (like mentioned above) you can still rely on CPP to do things for already provisioned clients that reach back and hit a specific CPP policy. By this I mean you can rely on ISE to push updates to module profiles, update client software etc.
HTH!
