Cisco provides utilities to help migrate configurations from ACS 5.x to ISE, though manual reconfiguration is often recommended for a clean deployment.

Cisco Secure ACS 5.5 reached its . After this milestone, the software became obsolete in the eyes of Cisco technical support.

Cisco Access Control System (ACS) 5.5 is a comprehensive identity and access management solution that provides a wide range of features to manage access to network resources. ACS 5.5 is designed to provide a scalable, flexible, and secure way to manage user identities, authenticate users, and authorize access to network resources.

Have you recently migrated from ACS to ISE? Share your biggest challenges in the comments below!

If you'd like, I can help you find to Cisco ISE or look for technical documentation on configuring ACS 5.5 if you already have the ISO. Do TAC still support ACS version 5.5 - Cisco Community

This means:

. Because it no longer receives security patches, it is highly susceptible to modern vulnerabilities. Do you need help with the specific steps to migrate