Enable Permission Set Expiration and Enhanced UI (Release Update)

With this update enabled, you can assign an expiration date to each permission set or permission set group. Permission set and permission set group assignments also use a new Lightning Experience interface and an improved workflow. Users can be assigned to permission sets or permission set groups with or without an expiration date. When a permission set or permission set group has an expiration date, users can lose access to functionality after the expiration date. By default, permission set and permission set group assignments don’t expire. This update was first available in Summer ’22.

Where: This change applies to Lightning Experience and Salesforce Classic in all editions.

When: Salesforce enforces this update in Winter ’23. To get the major release upgrade date for your instance, go to Trust Status, search for your instance, and click the maintenance tab.

How: To review this update, from Setup, in the Quick Find box, enter Release Updates, and then select Release Updates. For Enable Permission Set & Permission Set Group Assignments with Expiration Dates, follow the testing and activation steps.

https://help.salesforce.com/s/articleView?id=release-notes.rn_forcecom_enable_permset_expiration_ru.htm&release=238&type=5