1. Click on the Cog
2. Click "Team Settings"
3. Click "Manage Team Members"
4. Click "Active Only"
5. Click "Include Archived"
6. Edit the archived user
7. Click this checkbox.
8. Click "Save Changes"
9. Click "Γ"
10. A restored user will not have any modules assigned. Click "Assign Modules" to grant them access.