Looking for logging into the Dynamics Failed 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 Dynamics Failed site. After that you can login as usual with your login credentials.
https://community.dynamics.com/nav/f/34/t/266217
https://community.dynamics.com/gp/f/32/t/155702
https://support.microsoft.com/en-us/help/919345/error-message-when-you-try-to-log-on-to-microsoft-dynamics-gp-this-log
https://www.mig.com/blog/dynamics-gp/fix-the-creation-of-the-login-failed-for-an-unknown-reason-error/
https://stackoverflow.com/questions/51377989/sqlconnection-using-dynamics-gp-username-and-password-login-failed-for-user
https://forum.mibuso.com/discussion/68208/dynamics-nav-service-tier-login-failed-for-anonymous-logon
https://dynamicsuser.net/gp/f/forum/31673/login-failed-for-user-domain-dynamicsgp
https://www.gpug.com/communities/community-home/digestviewer/viewthread?MessageKey=a9046c79-f052-43cb-a77a-4703e320b6cc&CommunityKey=c125ab0e-76e0-4143-9460-ecc62353cec8&tab=digestviewer
http://liid.com/blog/lii_faq/i-get-the-error-authentication-failed-when-trying-to-type-in-my-crm-credentials/
https://gplifehacks.com/2018/02/28/dynamics-gp-power-bi-resolve-error-this-login-failed/
https://support.jetglobal.com/hc/en-us/articles/360017703154-Login-Failed-with-Dynamics-NAV-2013-and-Higher-SQL-Server-Data-Source
https://msdynamicsworld.com/story/dynamics-gp/microsoft-dynamics-gp-blogs-tfs-error-login-fail-sql-typo-permissions-error-file-e
https://github.com/MicrosoftDocs/dynamics-365-unified-operations-public/issues/738