I'm banging my head against a wall with this one!
For the last 20 years or so I've used an email address which is my.name@isp.co.uk. I've just bought a new computer and installed Microsoft Office 365 which includes Outlook as an email client, which I like. The problem I have is that my Microsoft user name is my old email name, which is what they've called my new Microsoft email account. If I look at the detail in Outlook behind my old email name then it's actually more like sdfjkl2457@microsoft.com It's not connected to my old account and I can't find a way of getting rid of it or adding my old account back in. Any ideas?