Microsoft To-Do for Android latest update adds multi-account support with version 1.45
With this new multi-account support (To-Do uservoice), users can add different Microsoft To-Do accounts and switch between them easily. Simply tap the drop-down menu, and you’ll be able to select from any other account that you’re signed into and switch views to the tasks associated with it. This feature will be useful for users who maintain Microsoft To-Do app for both their work and home life.
This update also fixes sign in loop for AAD users and offline logout bug for AAD accounts.