File signed agreements, keep order receipts, bundle handoffs. Every one is ready to run, and you can adjust it in plain language.
Reconcile flagged people with approved lists and confirm each removal.
Keep your discussion channels aligned with access reviews, and give reviewers before and after member lists.
Check approved channel assignments against membership and flag exceptions.
Give new colleagues the channel access their onboarding checklist calls for, with a clear list of what worked and what needs your attention.