Activating and deactivating a user
Filter the Customer by following the steps listed here
Click the three dots on the top right corner of their profile
Click on ‘Activate Customer’ or ‘Deactivate Customer’
If a user is active, you’d see ‘Deactivate Customer’ on users' profile details page.
While if the user is inactive, you would see ‘Activate Customer’ on the user’s profile details page.

Deactivating a Customer
Activating a Customer