Looking for logging into the Change Root User Plesk site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Change Root User Plesk site. After that you can login as usual with your login credentials.
https://mediatemple.net/community/products/dv/204644840/how-do-i-change-or-update-account-passwords
https://support.plesk.com/hc/en-us/articles/115000594474-Is-it-possible-to-change-login-of-the-main-Administrator-in-Plesk-
https://talk.plesk.com/threads/change-root-server-password-not-admin-password.334664/
https://support.plesk.com/hc/en-us/articles/213946685-How-to-disable-root-administrator-login-into-Plesk
https://www.transip.eu/knowledgebase/entry/375-cant-login-root-with-plesk/
https://www.quora.com/How-do-I-change-the-root-user-password-in-Plesk
https://mediatemple.net/community/products/dv/204405354/plesk-users-explained
https://plesk.uservoice.com/forums/184549-feature-suggestions/suggestions/4030284-change-admin-username
https://www.hivelocity.net/kb/how-to-change-the-plesk-user-password-in-plesk-12-windows/
https://www.a2hosting.com/kb/a2-hosting-products/windows-hosting/changing-the-document-root-directory-in-plesk
https://www.tagadab.com/knowledgebase/changing-root-password-linux
https://www.hostdime.com/kb/pages/viewpage.action?pageId=2228421