Why Does Imap Authentication Fail on My Outlook Hosted Email?

I am using IMAP to access an Outlook inbox.

I am authenticating as so, taking the IMAP info from the account:

    var imap = new Imap({
        user: user.name,
        password: user.pass,
        host: 'outlook.office365.com',
        port: 993,
        tls: true
      });

This returns the following error

Error: LOGIN failed.
    at Connection._resTagged (/node_modules/imap/lib/Connection.js:1502:11)
    at Parser.<anonymous> (/node_modules/imap/lib/Connection.js:194:10)
    at Parser.emit (node:events:527:28)
    at Parser._resTagged (/node_modules/imap/lib/Parser.js:175:10)
    at Parser._parse (/node_modules/imap/lib/Parser.js:139:16)
    at Parser._tryread (/node_modules/imap/lib/Parser.js:82:15)
    at TLSSocket.Parser._cbReadable (/node_modules/imap/lib/Parser.js:53:12)
    at TLSSocket.emit (node:events:527:28)
    at emitReadable_ (node:internal/streams/readable:578:12)
    at processTicksAndRejections (node:internal/process/task_queues:82:21) {
  type: 'no',
  textCode: undefined,
  source: 'authentication'
}

I can't find any info on this error, can you see what I'm missing?