Included in this article:
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Notes
You need to be running the latest ESR (extended-support release) version of Thunderbird. Download here: https://www.thunderbird.net/en-US/
You need to enable cookies in Thunderbird in order to use OAuth 2. Enable cookies by going to Options > Privacy & Security > select Accept cookies from sites under the Web Content section.
The Thunderbird mail client provides access to Microsoft 365 (M365) email, but not calendar or tasks.
Step-By-Step Configuration:
Open Thunderbird. Under Local Folders, click Email under the 'Setup Another Account' heading.
Enter your name, username@uwaterloo.ca and password in the 'Setup your Existing Email Address' page. Click Configure manually... (Note: your username is your 8-character UWaterloo username, i.e. j25rober)
The Incoming and Outgoing settings appear in the expanded options.
Ensure that they are setup to look like the settings below. Once your settings match as shown below, click Done. (Note: your username is your 8 character UWaterloo username, i.e. j25rober) | If OAuth2 is not listed under the Authentication drop-down menu, click Re-test or Advanced config to get the OAuth2 option to appear. |
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4. You will be prompted with an ADFS login. Enter your credentials password and click Sign in.
You will be prompted for 2-factor authentication. Select your preferred prompt option and click OK.
5. Accept the permissions requested and your account should now be setup!
Reconfigure folder mapping in Thunderbird for Microsoft 365 Mailbox
Clients configured using Microsoft Exchange protocol use different folders for some of the primary mail folders. For consistency, we highly recommend that you configure Thunderbird to use these same folders. This will make it less confusing if you also use the web client for Microsoft 365 or a different desktop client that is using the Exchange protocol.
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Click the OK button.
Restart Thunderbird
Disable the adaptive junk mail controls
Microsoft 365 server-side junk/spam filtering is already enabled for all M365 accounts.
Right-click on the email address you just configured in the left-hand pane.
Click on Settings.
Click Junk Settings from the left-hand options pane.
Uncheck the box for Enable adaptive junk mail controls for this account.
Click the OK button.
Common Microsoft 365 folders and Thunderbird
There are common mail folders on a Microsoft 365 (M365) Outlook email account e.g. 'Deleted Items', 'Drafts' and 'Sent Items'.
The Thunderbird program can 'subscribe' to these folders so that you can tell Thunderbird to use these Outlook folders when Thunderbird does the following:
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