Office 365 (Thunderbird) - How To's for Email and Calendar

Best Effort Support Only

This document contains instructions on using a non-Microsoft email client, such as Apple Mail or Thunderbird. Microsoft does not recommend these clients for use with Office 365, and there are often significant limitations in client functionality as a result.

Because of this, the DoIT Help Desk is only able to offer best effort support for these clients, and certain issues may require the use of a Microsoft client in order to be resolved. For more information on Office 365 client support, please see: Office 365 - Which clients/protocols will be supported?.

This document lists common functions/features for Office 365 Email/Calendar and links to resources that explain how to perform each function/action using Thunderbird.



Sending a Message

Managing Messages


Contacts (People)

Personal Groups (distribution lists)

Customizing Message Options





  • Create an Event/Appointment (Not Possible)
  • Modify an Event/Appointment (Not Possible)
  • Set Event Recurrence (Not Possible)


  • Invite an Attendee (schedule a meeting) (Not Possible)
  • Respond to Invitations (Not Possible)
  • Invite a non-Office 365 Attendee (Not Possible)
  • Check Availability (Scheduling Assistant) (Not Possible)

Interaction and Customization

  • Create a New Calendar (Not Possible)
  • Delete an Existing Calendar (Not Possible)
  • View and Hide Calendars (Group View) (Not Possible)
  • Change Calendar Views (Not Possible)
  • Assign Categories (Not Possible)
  • Change Calendar Color (Not Possible)
  • Event Reminders/Notifications/Flags (Not Possible)

Calendar Sharing/Permissions

  • Assign 'read' permissions (Not Possible)
  • Assign 'write/modify' permissions (Not Possible)
  • Working with other calendars (Not Possible)

Subscribe to Calendars

  • Subscribe to O365 Calendars (Not Possible)
  • Subscribe to Internet (External) Calendars (Not Possible)
  • Unsubscribe from a Calendar (Not Possible)


Contacts (People)

  • Create Contact (Not Possible)
  • Edit/Modify Contact (Not Possible)
  • Invite Contact (Not Possible)

Personal Groups

  • Create Personal Group (Not Possible)
  • Edit/Modify Personal Group (Not Possible)
  • Invite Personal Groups (Not Possible)


  • Create a Task (Not Possible)
  • Edit/Modify a Task (Not Possible)


Keywords:microsoft office365 o365   Doc ID:42648
Owner:Help Desk KB Team .Group:DoIT Help Desk
Created:2014-08-08 09:08 CDTUpdated:2020-08-13 18:22 CDT
Sites:DoIT Help Desk, Office 365
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