Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://support.mozilla.org/en-US/kb/microsoft-oauth-authentication-and-thunderbird-202 below:

Microsoft OAuth Authentication and Thunderbird in 2024

Microsoft has made some changes to authentication for their hosted email services for business and academic accounts. This article describes these changes and how to adjust to them.

As of October 2024, this information is still evolving and subject to change. Please

in order to have the best experience with Microsoft's email services. Due to Microsoft's ever-changing diversity of email servers and deployments, issues can emerge without warning that cause Thunderbird and other non Microsoft email clients to suddenly stop working after working for some time.

Microsoft has instituted the following changes:

• Deprecated basic authentication (username/password), and is instead now requiring OAuth authentication.
• In some cases, SMTP authentication has been completely disabled. For new accounts, SMTP always starts disabled. In addition, there are some restrictions on SMTP that are not currently understood.

Microsoft has also changed the way they classify certain clients, and Thunderbird’s previous OAuth setup does not properly qualify as a desktop client. As a result, we have been forced to make configuration changes to Thunderbird, which may have side effects for users.

For outlook.com, hotmail.com, Microsoft 365 (formerly known as Office 365 and often abbreviated as “O365”) or other Microsoft-hosted email services, you may see the following issues:

• Thunderbird might display an error message similar to: Login to server outlook.office365.com with username youremail@hotmail.com failed.
• Solution
  • Ensure two-step verification is turned on for your Microsoft account (see Microsoft's Knowledge Base article: How to use two-step verification with your Microsoft account).
  • Enable cookies for Microsoft's Outlook or Hotmail websites in Thunderbird, otherwise you will not be able to log in to your Outlook or Hotmail account using OAuth2 authentication.
    1. Click > > .
    2. Under Web Content section, tick Accept cookies from sites.
    3. Click Exceptions… next to Accept cookies from sites to make sure you are not blocking cookies from Microsoft sites, such as outlook.com, hotmail.com or office365.com.
  • Change Thunderbird authentication method for incoming mail (IMAP or POP).
    1. Click > .
    2. On the left side, click Server Settings for your outlook.com or hotmail.com account.
    3. Select Authentication method: (instead of Normal password).
       
  • Change Thunderbird authentication method for sending messages (SMTP):
    1. Click > .
    2. On the left side, click .
    3. On the right side, select your Microsoft account and click Edit…
       
    4. Select Authentication method: (instead of Normal password).
       
    5. Server Name might need to be changed from smtp.mail.outlook.com to smtp.outlook.com, or from smtp.outlook.com to smtp.office365.com.
    6. Click OK to save your changes.

• You must ask your administrator to authorize Thunderbird – approval must be done, but only once.
• Per Microsoft documentation, administrators should visit https://login.microsoftonline.com/{tenant-id}/adminconsent?client_id=9e5f94bc-e8a4-4e73-b8be-63364c29d753 and grant the following permissions in order to authorize Mozilla Thunderbird: IMAP.AccessAsUser.All, POP.AccessAsUser.Al, SMTP.Send and offline_access

• Try to sign in with a new Thunderbird profile (see Profile Manager - Create and remove Thunderbird profiles for instructions on how to create a new profile).
• If a new Thunderbird profile works, we recommend to continue using the new profile.
  For experienced users who want to keep other changes made in the config editor:

  Use the Thunderbird profile manager to switch back to the old Thunderbird profile and use the

  Config Editor

  to filter for

  oauth2

  , find the appropriate server(s), and delete the entries for

  oauth2.issuer

  and

  auth2.scope

  .

• Otherwise, ask for support.

• If you have a Microsoft 365 business account, ensure that SMTP authentication is enabled or ask your IT administrator to check and turn it on if disabled. Read Microsoft's article Enable or disable authenticated client SMTP submission (SMTP AUTH) in Exchange Online for instructions.
• If you have a Microsoft 365/Hotmail/etc. personal account, use basic authentication (read Microsoft's guide POP, IMAP, and SMTP settings for Outlook.com for instructions).

• Thunderbird does not support Exchange calendars. If you are using an add-on or other software to enable calendar, then you will need to seek support from the author of that add-on or software.

• If you are a user within a business or academic institution that provides Microsoft accounts, you should seek assistance within your organization.
• If you have a personal account through one of Microsoft's hosted services, ask for support.

These fine people helped write this article:

Grow and share your expertise with others. Answer questions and improve our knowledge base.

Learn More

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.3