Incoming IMAP
Server: imap-mail.outlook.com
Server port: 993
Encryption: SSL
Outgoing SMTP
Server: smtp-mail.outlook.com
Server port: 587
Encryption: TLS
For anyone on Android having trouble setting up the outgoing SMTP settings on their mail account like I was: set the security type to STARTTLS instead of SSL/TLS.
I really wish companies would get SSL vs TLS vs STARTTLS right. I wrote about this on our blog a while back and ended up turning it into a help page because people still seem to get confused.