Microsoft App registrations have a maximum time period of 2 years. Generally, App registrations are 1 or less for most third party apps.

We have made it easy to address an expiring app registration for Control Portal SSO

Log into the Control portal as a user with Admin rights, go to the Single sign-on menu.

Click on Configure MTP portal account

Click on the purple Provisioning button

Click on the purple Provision button

Click on the blue Sign in button and use an account on your Microsoft 365 tenant with Global Admin rights.