How do I delete an User in Vtiger CRM?

However, to delete a user, you must first suspend them.
Follow these steps to delete a user after suspending them:

1. Log in to the CRM.
2. Click the User Menu on the top right corner of the CRM screen.
3. Click Settings. The settings page opens. 
4. Look for the User Management section.
5. Select Users. The Users page opens.
6. Click the Inactive Users tab. 
7. Hover over the user that you want to delete. 
8. Click the More icon.
9. Select the Delete user permanently option.
10. Click Yes to confirm.
11. Enter or select the following information to handle the reportees and assigned records for the deleted user:
    1. Transfer Reportees: If the deleted user has reportees, transfer their supervision to another user.
       1. Select a user from the Transfer Reports To dropdown.
       2. The Reports To field in the reportees' records will update to reflect the new supervisor.
    2. Transfer Assigned Records: When deleting a user, you must transfer the records that are assigned to them.
       1. Enable the Transfer all records checkbox to transfer all the user’s records.
       2. Use the Select Modules field to specify which modules’ records you want to transfer.
       3. Select a user from the Transfer records to this user dropdown to transfer records to them.
       4. Enable the Transfer closed records checkbox to include closed records in the transfer.
12. Click Save. 

Note: Comments, emails, and change logs are not transferred. A change log is an entry of an update made by a user to any record.