In the System Events On the ADFS Servers, Noticed Events with description An Error Occured while uisng SSL COnfiguration for End Point 0.0.0.0:443, the error status code contained with the returned data followed with Event ID: 15021. When try to browse the ADFS idpinitiatedsignon page, it is getting failed.
Normally, this issue occurs if the certificate renewal or certificate upgrade has not been done properly.
To Solve this issue,
run the CMD: Netsh http show sslcert to check the current certificate bindings
See the certificate which has been upgraded is in IP: Port binding–> Certificate hash. If it contains old certificate and that is not available in the Certificate MY Store, above event will get generated and users can not browse the site or ADFS Page will not get loaded.
To solve this issue, first delete the old certificate has which is currently bonded for the 0.0.0.0:443 using the command
netsh http delete sslcert ipport=0.0.0.0:443
Next, bind the new Certificate has for the ipport=0.0.0.0:443 using the below command
add sslcert ipport=0.0.0.0:13286 appid='{App ID’} certhash=<thumbprint without space>
Now, restart the ADFS Service and check the events and browse the ADFS idpinitiatedsignon page and see it shows new certificate and page is getting loaded.