New Outlook won't let me add my outlook email account.

i can not add another e-mail account to my outlook

Thanks @TinkerUK. I would like Microsoft to continue to allow alias email addresses and fix this.

There has been a lot of discussion on this post since I first added a point, but now I have a fix for my problem which I will share with you in the hope that it helps you.

My problem was that I could not get the New Outlook to register my outlook email address. I need this address to be registered as I sync calendar and contacts using MS Exchange. I found the solution while fixing another outlook problem which was, if I sent an email using outlook and the recipient wanted to reply then their message would fail. The cause of this problem is that the return address supplied by outlook consisted of 10 numbers @outlook.com. A web search identified it as a know problem involving address aliases. Historical note - When you first registered an account with MS you would have used your normal email address (google, yahoo, etc.) MS would than have created for you an outlook email account and put your email address as an alias. The fix for this number problem was to remove the alias address. I did this and it fixed the return address problem. I then tried registering with the New Outlook and it all worked perfect. To change you alias config go to https://account.live.com/names/Manage.

Best of luck.😎

MICROSOFT - I have identified what the problem is with regard to New Outlook and Outlook mail. Now get your finger out and do a proper solution to this and the 10 number outlook address

I have the same issue, it asks me to put a valid email even though it's my Outlook email ending in @outlook.com

exactly, I have Outlook on my desktop with Office 365. Outlook will no load, not can I chose to load it with an existing Outlook account.

When I shut down the computer, upon start up, Windowns did not sign into my normal seeting in the desktop, OS or my Outlook account. In Excel, Word and PowerPoint - none of my recent files are there anymore... nor my email account in Outlook. When Windows automaticlaly updated to Windows - it did not sync my curent files and accounts.

How can I fix this?