o365 doesnt include any email account.
The free mail accounts from MS, eg outlook.com are not part of o365, any valid mail account can be added to MS Outlook, the mail Client included with o365
Recovery/password change for thes free mail account are an online process only with no phone/contact support
If o365 desktop and a functioning mail account had been added any password are autosaved and none are required to login, or use the individual apps