Go to that user
Scroll about 1/3 of the way down and find the "Active" checkbox
Uncheck it and hit the submit button. This will inactivate deactivate that account.
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Manage space
Manage content
Integrations
Go to that user
Scroll about 1/3 of the way down and find the "Active" checkbox
Uncheck it and hit the submit button. This will inactivate deactivate that account.