Grant channel access, remove members, audit shared files. Every one is ready to run, and you can adjust it in plain language.
Confirm security channel membership after approved removals.
Keep your discussion channels aligned with access reviews, and give reviewers before and after member lists.
Give outside specialists restricted access to cleared incident reports.
Your outside reviewer gets a restricted report link and deadline for the incident review. You get a copy of the request or a clear problem to fix.