When you have added a user, you are given the option to delete that person's user access. However, deleting user access will also delete the records associated with that user.

It is important to consider deleting someone's user access as opposed to making their access inactive. Making the account inactive will still maintain the records associated with that person.

To make someone's account inactive, go to User Access and open their user access record. At the bottom of the screen is a box named Permissions with a check box labeled Active, that you will uncheck. This user is now inactive and cannot login anymore, but their records with your institution are still intact and can be used for reporting and evaluating. Make sure to Save this change to their user access record.