Looking for logging into the Qnap Only The Account Admin Can 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 Qnap Only The Account Admin Can site. After that you can login as usual with your login credentials.
https://www.qnap.com/en/how-to/tutorial/article/how-to-disable-the-admin-user-account//
https://forum.qnap.com/viewtopic.php?t=90710
https://www.qnap.com/en/how-to/faq/article/why-cant-the-users-login-the-multimedia-station-only-admin-user-is-possible//
http://docs.qnap.com/nas/QTS4.3.4/en/GUID-E730CEE6-F218-4F22-84DA-8ABDCB40068F.html
https://www.qnap.com/en-au/how-to/tutorial/article/advanced-folder-permissions-on-qnap-nas/
https://www.bleepingcomputer.com/forums/t/642204/somebody-tried-to-login-to-my-qnap/
http://qnapsupport.net/teknik-destek/admin-kullanici-adimi-ve-sifremi-unuttum/
https://www.reddit.com/r/qnap/comments/82io8v/qentware_can_only_be_run_with_the_admin_user/
https://www.reddit.com/r/qnap/comments/8w56b4/help_your_login_credentials_are_incorrect_or_your/
https://www.youtube.com/watch?v=KtUma6NmKQs
https://community.spiceworks.com/topic/2018263-qnap-folder-permissions-issues
https://community.roonlabs.com/t/admin-login-fail-samba/36286
https://forum.qnapclub.de/thread/1801-howto-ssh-login-nicht-als-admin/