# Delete HSM users using AWS CloudHSM Management Utility
Delete users

Use **deleteUser** in the AWS CloudHSM Management Utility (CMU) to delete a hardware security module (HSM) user. You must log in as a CO to delete another user.

**Tip**  
 You can't delete crypto users (CU) that own keys. 

**To delete a user**

1. Use the configure tool to update the CMU configuration.

------
#### [ Linux ]

   ```
   $ sudo /opt/cloudhsm/bin/configure --cmu <IP address>
   ```

------
#### [ Windows ]

   ```
   PS C:\> & "C:\Program Files\Amazon\CloudHSM\configure.exe" --cmu <IP address>
   ```

------

1. Start CMU.

------
#### [ Linux ]

   ```
   $ /opt/cloudhsm/bin/cloudhsm_mgmt_util /opt/cloudhsm/etc/cloudhsm_mgmt_util.cfg
   ```

------
#### [ Windows ]

   ```
   PS C:\> & "C:\Program Files\Amazon\CloudHSM\cloudhsm_mgmt_util.exe" C:\ProgramData\Amazon\CloudHSM\data\cloudhsm_mgmt_util.cfg
   ```

------

1. Log in to the HSM as a CO user.

   ```
   aws-cloudhsm > loginHSM CO admin co12345
   ```

   Make sure the number of connections CMU lists match the number of HSMs in the cluster. If not, log out and start over.

1.  Use **deleteUser** to delete a user. 

   ```
   aws-cloudhsm > deleteUser CO example_officer
   ```

   CMU deletes the user.

   ```
   Deleting user example_officer(CO) on 3 nodes
   deleteUser success on server 0(10.0.2.9)
   deleteUser success on server 1(10.0.3.11)
   deleteUser success on server 2(10.0.1.12)
   ```

For more information about **deleteUser**, see [deleteUser](cloudhsm_mgmt_util-deleteUser.md).