Looking for logging into the Securetokenservice 2016 Unable To To Dynamics 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 Securetokenservice 2016 Unable To To Dynamics site. After that you can login as usual with your login credentials.
https://github.com/MscrmTools/XrmToolBox/issues/375
https://community.dynamics.com/crm/f/117/t/186473
https://community.dynamics.com/crm/f/117/t/185268
https://support.microsoft.com/en-us/help/2419389/internet-browser-can-t-display-the-ad-fs-webpage-when-a-federated-user
https://docs.microsoft.com/en-us/dynamics365/customer-engagement/developer/active-directory-claims-based-authentication
https://support.microsoft.com/en-us/help/3210340/you-encounter-an-error-trying-to-sign-in-to-dynamics-365-online
https://docs.wso2.com/display/IS510/How+To%3A+Login+to+Dynamics+CRM+via+Identity+Server
https://support.cazoomi.com/hc/en-us/articles/204089335-Dynamics-365-authentication-methods-and-supported-versions-of-Dynamics-365
https://support.clickdimensions.com/hc/en-us/articles/115001157433--The-authentication-endpoint-Username-was-not-found-on-the-configured-Secure-Token-Service-Error-When-Registering
https://www.loganconsulting.com/blog/adding-users-from-another-aad-tenant-in-dynamics-365-for-operations/
https://docs.mulesoft.com/release-notes/connector/microsoft-dynamics-crm-connector-release-notes
https://www.kingswaysoft.com/products/ssis-integration-toolkit-for-microsoft-dynamics-365/help-manual/crm/connection-manager
https://colinvermander.com/2016/12/27/using-your-dynamics-365-portal-in-an-iframe/