What changes for Brother devices
Microsoft's notice MC786329: “End of December 2026: SMTP AUTH Basic Authentication will be disabled by default for existing tenants.” It applies to any device that signs in to Microsoft 365 with a username and password, whatever the brand. Admins can still turn it back on for now. Microsoft will announce the final removal date in the second half of 2027.
What Brother says about Microsoft 365
To continue using these features in Microsoft Exchange Online (if your machine supports OAuth 2.0 authentication), you must update the firmware to the version that supports this authentication and configure the OAuth 2.0 authentication settings.
Brother, OAuth 2.0 Authentication Support Statement (read October 30, 2026)
- “Check the “Product Support List” below to see if your machine supports OAuth 2.0 and if the latest firmware is already available or scheduled for release.” (Source)
- “If your machine is not listed, it does not support OAuth 2.0. Use an alternative email service (for example, Gmail).” (Source)
Where the scan-to-email settings are
In Brother's instructions the device's browser settings page is called Web Based Management (Source). Open it by typing the device's IP address into a browser on the same network, and sign in as the administrator.
The email settings, as Brother names them: Network > Network > Protocol (Source)
Turning on OAuth, in Brother's words
- Under Protocol, click Advanced Settings next to the POP3/IMAP4/SMTP Client option (Source)
- Click the Third party (OAuth2) button. (Source)
Whichever route you choose, you'll fill in the same handful of fields: the SMTP server, the port, the encryption, whether to sign in, and a username and password.
Your options on a Brother
1. OAuth, on models Brother lists
Microsoft recommends OAuth for devices that send through smtp.office365.com. The device keeps port 587 and TLS (TLS 1.2 or TLS 1.3) and signs in with Microsoft instead of a stored password. Follow Brother's steps on the page above.
2. CopierBridge, for devices that can't
Keep the device on a username and password. Turn on Authenticated SMTP for the mailbox it sends as (Microsoft's steps), connect that mailbox to CopierBridge once, add the device, and type these values into its scan-to-email settings:
- SMTP server
- smtp.copierbridge.com
- Port
- 587
- Encryption
- STARTTLS
- Authentication
- On (username and password)
- Username
- frontdesk-copier
- Password
- ••••••••••••••••
- From address
- scans@example.com
3. Microsoft's other routes
An SMTP relay connector (static IP, port 25), Direct Send or High Volume Email (both internal recipients only), or an on-premises Exchange relay. Each one is set out step by step in the full guide.
If scan to email stopped working
Read the message the Brother shows and look it up on Microsoft 365 SMTP errors, or work through scan to email not working.