Noticed IDPInitiated signon page is not loading by default in Adfs 2016 as it is loading in pervious versions.
Default IDP URL : https://adfsname.domainname.com/adfs/ls/idpinitiatedsignon.aspx
In my case, https://sts.windowstechpro.com/adfs/ls/idpinitiatedsignon.aspx
Ideally, in ADFS 2016 it is disabled by default.
Run the below command to see status of the IDP Initiatedsignon page.
Get-AdfsProperties | Select-Object EnableIdpInitiatedSignonpage
Now, To enable the IDP Initiatedsignon page run the below command,
Set-AdfsProperties –EnableIdpInitiatedSignonPage $True
restart the adfe service in all the adfs 2016 servers using the command
it can be done using services.msc as well.
It is all done, try to load the Idpinitiated signon page