SymptomsThe customer enabled Domain Administrator access in Parallels Plesk Panel (Domains -> domain.tld -> Domain Administrator: Allow domain administrator's access) .
After unchecking the access it should disable it but it does not. Domain Administrator is still able to login to Parallels Plesk Panel.
How to resolve the problem?
ResolutionThe problem has been fixed in Parallels Plesk Panel since version 9.2.
Hotfix for Parallels Plesk Panel 8.6 is attached. To install it download the file, extract the archive and replace existent file PRODUCT_ROOT_D/admin/plib/cmd_loginup.php. Please remember to correct permissions. You may use the following commands:
~# unzip cmd_loginup.zip
~# cp /usr/local/psa/admin/plib/cmd_loginup.php /usr/local/psa/admin/plib/cmd_loginup.php.bak
~# cp cmd_loginup.php /usr/local/psa/admin/plib/cmd_loginup.php
~# chown root:root /usr/local/psa/admin/plib/cmd_loginup.php
~# chmod 644 /usr/local/psa/admin/plib/cmd_loginup.php
Now Domain Administrator is unable to login to Parallels Plesk Panel after Domain Administrator access was disabled.