Looking for logging into the My Ecp 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 My Ecp site. After that you can login as usual with your login credentials.
https://www.myecp.com/
https://secure.ecp123.com/
https://www.youtube.com/watch?v=LP11Rr-7hYs
https://social.technet.microsoft.com/Forums/office/en-US/d39ac16f-be7e-4079-b3cd-f86fe0b87edb/ecpowa-login-loop?forum=exchangesvrclients
https://docs.microsoft.com/en-us/exchange/architecture/client-access/exchange-admin-center
https://community.spiceworks.com/topic/2098064-exchange-2013-owa-and-ecp-unable-to-login-no-error-messages
https://community.spiceworks.com/topic/2181579-exhange-2013-ecp-flashes-at-login-puts-me-back-at-login-screen-owa-works
https://www.statcan.gc.ca/eng/mystatcan/login
https://www.experts-exchange.com/questions/29113835/cannot-log-into-OWA-or-ECP-login-loop-after-renewing-self-signed-cert-'Microsoft-Exchange'.html
https://www.reddit.com/r/exchangeserver/comments/654f6o/ecp_owa_reloads_logon_page_after_entering/
https://www.sslsupportdesk.com/troubleshooting-exchange-unable-to-open-owa-ecp-or-ems-after-a-self-signed-certificate-is-removed-from-the-exchange-back-end-website/
https://fiscal.treasury.gov/ecp/
https://www.office.com/?ui=ka%2DGE&rs=GE