I'm running Outlook 2016 on Windows 10 x64 Enterprise (clean install).
When trying to configure mail accounts Outlook can't find 'mail server' . This applies to my own domain email account as well as my gmail account, both IMAP
All ran perfectly well on Win7 x64
And yes, I do know perfectly well how to do that and followed all the proper steps, so I don't need any advice there. I wonder if others encountered this problem too. I had extensive contact with my domain provider, but there's nothing wrong on their side.
Both mail accounts work perfectly in Win10's propriety mail solution, but I prefer to handle my mail through Outlook.