Hello CattieH,
Thank you for reaching out to Microsoft Q&A. I understand you are experiencing sign-in errors when trying to connect your Hotmail account to Outlook for Mac Version 16.16.27, even though you are using the correct credentials.
Please know that you are not doing anything wrong, and your password is absolutely correct! The reason you are getting this error is that Microsoft permanently disabled "Basic Authentication" (logging in with just a simple username and password) for all personal Hotmail and Outlook accounts in September 2024. Microsoft now requires a newer security standard called Modern Authentication (OAuth2).
Because your older version of Outlook for Mac does not support this new security standard, it can no longer connect to the server. However, you have two great, free options to get your emails onto your Mac right now:
Option 1: The Free, Modern Outlook for Mac
Microsoft has made the newest version of Outlook for Mac completely free to download and use for personal accounts. It natively supports the new security requirements.
- Open the App Store on your Mac.
- Search for Microsoft Outlook and download the app.
- Open the app and enter your Hotmail address.
- A secure Microsoft login window will appear. Simply enter your password to authenticate, and your emails will immediately begin downloading.
Option 2: Apple's Built-in Mail App (Best for offline downloading)
Since you are running macOS Sequoia, your Mac's default Apple Mail app already supports Microsoft's new security requirements. This is also the easiest way to download a hard copy of all your emails to your Mac's hard drive.
- Open System Settings on your Mac.
- Click Internet Accounts, then Add Account.
- Select Microsoft Exchange (Note: Apple uses the Exchange option to securely route all modern Hotmail/Outlook logins. Do not select "Other").
- Enter your name and Hotmail address, click Sign In, and follow the prompts.
- Open the Apple Mail app to let your inbox sync.
- To save a backup: Click on your Inbox, go to the Mailbox menu at the top of your screen, and select Export Mailbox. This will download all your emails into an .mbox file directly onto your Mac.
I hope this helps you get your emails downloaded successfully. Please let me know if you run into any issues with either of these methods, and I will be happy to assist you further!
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