Last Monday the IIS webpage started to show the below.
A temp fix that held was put in place and all was good without finding out why. Then today ( Monday) same again.
This page can’t be displayed
Turn on TLS 1.0, TLS 1.1, and TLS 1.2 in Advanced settings and try connecting to https://name.domain.ie
again. If this error persists, it is possible that this site uses an unsupported protocol or cipher suite such as RC4 (link for the details), which is not considered secure. Please contact your site administrator.
Of course the TLS 1.0 are turned on and doesn't matter what browser you use.
I uninstalled updates that where applied on the Friday before but no different
I created a self assigned cert that worked where the users can click on 'Continue' to get to the page.
What could make the IIS do this on a Monday?
Windows 2012 R2