Thanks Mathew,
That link for PKCE went to Restart Replication.
Is this the one you intended?
https://techdocs.broadcom.com/us/en/ca-enterprise-software/layer7-api-management/api-management-oauth-toolkit/4-1/customizing-the-oauth-toolkit/configure-pkce-support.html
Robert Kohler
Sr. Technical Analyst, IT