You can easily access your Hotmail mailbox through Office 365 using the SysInfo Hotmail Backup Tool. Instead of signing in with just your Hotmail email and app password, the tool also gives you the option to log in using your Office 365 account. It supports two secure login methods: one is Modern Authentication, which opens a browser window for sign-in, and the other is using a Client ID and Client Secret—useful for organizational accounts. Once you're logged in through Office 365, the tool connects to your Hotmail account and lets you backup or migrate emails, contacts, calendars, and other data easily.