UAT Website not working in Microsft Edge browser

I have UAT website, which is hosted in client's domain. So on all other browser its working fine, but when i try that to open into microsoft edge it gives me an error. I already tried below steps

1. I cleared all history, cache,cookies etc.

2. I have also updated the allow sites from internet options->security->Trusted Sites. And in that I have added UAT website address, still no luck.

Error "Cant reach this page". Is it network issue or microsoft edge issue? If anyone know the resolution on this then kindly let me know.

Edge browser Version - 44.17763