1 answer
Hi Molly,
There are different ways of Activating the checkbox .it is possible through UI ,code ,Flows.
You can use either of them to do so.
By Using Flows. https://trailhead.salesforce.com/en/content/learn/modules/session_based_perms/session_based_activate
By using code : https://developer.salesforce.com/docs/atlas.en-us.224.0.api.meta/api/sforce_api_objects_sessionpermsetactivations.htm?search_text=SessionPermSetActivation
Also you can enable the checkbox while you are creating the permission set for the frst time
Also you can enable this when you are editing the permisiion set.