Problem statement
Planning an IP address migration of the Issuer URL for an OIDC Enterprise connection.
Solution
Changing the IP address of an Issuer URL should not have an impact on an OIDC connection. The connection is not tied to a particular IP address and just performs standard HTTPS verification on the discovery URL and its related endpoints.
So as long as those endpoints remain available to Auth0 on the same URLs as they are now, and have valid HTTPS certificates after their IP migration, there should be no impact or action required.