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Hi Jace,
I’m sorry you’ve been dealing with this incident for two weeks, especially since these email accounts are essential to your business.
Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas only.
This incident may be related to the authentication connection between Apple Mail and Microsoft 365. First, please check whether you can access the affected accounts through Outlook on the web. If webmail works, the incident is likely related to the Apple Mail connection.
Please try the following steps with one account first:
- Open Keychain Access on your Mac.
- Search for the affected email address and keywords such as Exchange, Microsoft, Office, or OAuth.
- Delete the saved credentials associated with that account.
- Restart your Mac.
- Add the account again from System Settings > Internet Accounts > Add Account > Microsoft Exchange.
A recent case involving Microsoft 365 through GoDaddy was resolved by removing the related credentials from Keychain Access, restarting the Mac, and then adding the account again.
I recommend testing this with one mailbox before making changes to all seven accounts. Please do not disable multi-factor authentication or other security settings.
If the incident continues, please share your exact macOS version and confirm whether the accounts work in Outlook on the web. Since the subscriptions were purchased and are managed through GoDaddy, GoDaddy Support will need to review the licensing and authentication configuration or assist with any refund request.
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