E-mail hosted on an Exchange Server can also be accessed using POP3, and IMAP4 protocols and Oauth authentication using clients Mozilla Thunderbird, but only if those protocols (Pop, Imap)are enabled on the server. Otherwise you would need to use OWL addon.

The best place to ask questions about OWL is with OWL. Some info is available on their website. Licenses are per email address. If you have several Exchange accounts, you would need to buy several licenses. But whether this is intended to be used on more than one computer I'm not certain, but I would have expected to be able to connect to more than one providing I had paid for the additional licenses which are ridiculously cheap. I do know you can purchase more licenses for a domain: https://www.beonex.com/owl/#domain-explanation

You can find their support email contact info at these locations:

• https://addons.thunderbird.net/en-us/thunderbird/addon/owl-for-exchange/
• https://www.beonex.com/owl/

There is help available for those of us who were using TBird with a POP3 account. GoDaddy has posted instructions to update your settings from POP/IMAP to Exchange for each device you use to check your email at: https://www.godaddy.com/help/add-my-microsoft-365-email-in-thunderbird-mac-and-windows-pc-41563 The instructions worked flawlessly on two of our computers where email was set up as a POP account. Before making these changes, be sure to disable cookie blocking in your default browser so when you press the "Done" button (as instructed) you can log into your Microsoft365 account to complete the transition.

These instructions apply if you received this email from GoDaddy around May 19, 2023:

Update your settings to keep your email app access working.

There are email accounts in your organization using Basic Authentication, which Microsoft will no longer support after 06/02/2023. You'll still be able to access your email through your browser, but not from an email app, such as Outlook or Apple Mail — don't worry, none of your emails will be lost.

In order to continue using your email apps, you need to update your settings from POP/IMAP to Exchange for each device you use to check your email. This also applies to other users who are set up within your account using POP/IMAP settings. Here's how to update your email settings.

Hi Can you tell me if the following works for you or not.

If you are using a VPN please switch it off. If you have another program using the localhost like 'Apache' then switch it off whilst trying to set up account.

In Thunderbird Set up the following:

• Menu > Settings > Privacy & Security
• Under Web Content
• Select 'Accept cookies from sites'
• Accept third party cookies 'Always'
• Keep until: 'they expire'

Check all the old passwords and account are removed.

• Scroll down to 'Passwords ' section
• click on 'Saved Passwords'
• Do you see any lines for the mail account?
• If yes, select the lines and click on 'Remove'

Check javascript is enabled:

• Menu > Settings > General
• scroll to bottom and click on 'Config Editor'
• In search type: javascript.enabled
• You need: javascript.enabled = true

Then try to add the mail account

• Menu > New > Existing mail account
• Enter name
• Enter email address
• Select to Remember password
• Click on 'Configure manually' button

You have to be very carefull when you are entering the settings. Do not make a mistake.

• Select the correct Protocol: IMAP
• Hostname: outlook.office365.com
• Port: 993
• Connection security: SSL/TLS
• Authentication method: OAuth2
• Username: Your full email address,

Then set up the Outgoing SMTP server settings:

• Hostname: smtp.office365.com
• Port: 587
• Connection security: STARTTLS
• Authentication method: OAuth2
• Username: Your full email address,

Then click on 'Done'

You should get prompted my MS Office to enter email and password to allow TB access.

We are currently trying to find out what is going on and need some feedback on whether my instruction work for you.