What changes for Epson 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 Epson says about Microsoft 365
Therefore Epson has added OAuth2.0 authentication to the devices listed below allowing you to continue connecting to Microsoft Exchange Online.
Epson, FAQ Article Page | Epson Europe (read October 30, 2026)
- Firmware
- “To ensure your device is compatible, please update to the latest firmware for your device.” (Source)
Where the scan-to-email settings are
In Epson's instructions the device's browser settings page is called Web Config (Source). Open it by typing the device's IP address into a browser on the same network, and sign in as the administrator.
Turning on OAuth, in Epson's words
- Access Web Config, then select the Network tab > Email Server > Basic. (Source)
- If you select OAuth2 as the Authentication Method, select an email service from the drop-down list. (Source)
- You must also enable SMTP AUTH in Exchange Online. (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 Epson
1. OAuth, on models Epson 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 Epson'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 Epson shows and look it up on Microsoft 365 SMTP errors, or work through scan to email not working.