When I have a Per-Request Policy end with a Reject, I get the default error page with the content:
Access to this page is blocked.
Access was denied by a per-request policy.
The session reference number: a9f2a37b
I'd like to customize this error page but can't find any instructions on how to do so.
When the Per-Request Policy triggers a Reject, it actually uses the Logout screen of the Access Profile. In order to modify this, you will have to enter the customization page of the Access Profile.
For instance, this page:
Check here for exact instrucitons: Customizing messages for the per-request policy Reject ending