In the situation where a user's access needs to be revoked or blocked - without deleting their user profile - a system administrator can disable the user's account. Vice versa, a user whose account has been previously disabled - or deactivated - can be re-enabled.
Steps
On the top right, navigate to → Manage Users
On the left, navigate toUser Management→ Users
Open the User page by clicking on the Full Name hyperlink
Click the Edit button
Under the User membership section, click the Disable checkbox (or uncheck it if you need to re-active the account)
Alternatively, you can also change the drop-down value of the Status field from Active to Inactive or vice versa.
Click Save to disable the user or Cancel to exit without saving.