User1771714573 posted
Hi HabaneroS,
One feature about ARR is client affinity. ARR can affinitize all requests from a client to a content server by using cookie. All subsequent requests from the same client would be routed to the same content server for the duration of the client
session. This feature is useful if the application on the content server is stateful and the client's requests must be routed to the same content server because the session management is not centralized.
It is not set in ARR but in server farm. Create a server farm and see its icon, choose the server affinity.

Check the client affinity and apply to enable this feature.

Best regards,
Brucz