Salesforce Fact #941 | Selective Sandbox Access

With the Winter'25 release, we now require to select a public group while creating a Developer or Developer-pro sandbox. This feature has been termed as 'Selective Sandbox Access'. 

This helps to provide access to the new sandbox to a group of users removing the tedious work of removing .invalid from the user's email. Users outside the public group would remain frozen.

Reference: https://help.salesforce.com/s/articleView?id=platform.data_sandbox_selective_access.htm&type=5