Solved resetting outlook after repairs.

[commander]

hard drive died and had to be replaced, so now i'm trying to put things back together. with my outlook: no domain listed (space is empty), user name is my email address, server is listed as outlook.office365.com. but I don't know what it is or

if I even have it. how do I go about resetting this email? I have correspondence with other people there that I can't get to.