how can I add a hotmail address as a ‘send and recieve account’? when I try i am told to link my accounts but linked account have been disabled

The option to have my accounts linked has recently been disable and a message came up to add on email as a 'send and recieve account' to another to be able to access and reply to all emails from one point. When I have tried to do this I got the message
"It looks like you're trying to add another Outlook account. Try linking your Outlook accounts together to make switching between them fast and easy.
"on following the link I got the message
"The page is unavailable or no longer exists"

there is nothing fast and easy about this. Please can someone let me know how to link/add them