M365 Outlook (Information) Desktop User

The Outlook desktop user offers full email and calendar functionality. Even with all the basic and advanced email, calendar, and address book features, desktop users have little mobility unless installed on a laptop. Supported versions include 2016 and 2019 for Windows and 2014 or 2016 for Mac.

The Outlook desktop user is recommended for those who:

Prefer a desktop user over a web user.
Manage multiple calendars or email accounts.
Frequently schedule complex meetings.
Must have offline access to email/calendar data.
Require archiving, importing, and exporting capabilities.
Do not require frequent mobile access.

Keep in mind that the Outlook desktop user:

Requires installation and some initial setup.
Always run in the background by default.
Does not provide much mobility.
Does not require a password after initial setup.