How to change a Protected directory users’ password in Plesk
If you decide to change a user’s password, perform the following steps:
1 – Logged in to Plesk.
2 – Go to Websites & Domains.
3 – Click Password-Protected Directories.
4 – Click the desired password-protected directory.
5 – Click the user whose password you want to change.
6 – Type in the new password, and click OK.