Is your Lexmark affected?
In the Embedded Web Server (the printer's IP address in a browser), open Settings, then E-mail, then E-mail Setup, where the Primary SMTP Gateway, port and authentication are set.
If the SMTP server is smtp.office365.com (usually port 587) and the copier signs in with a Microsoft 365 email address and password, it's affected. Menu names vary by model; your dealer can also check over the phone. Or answer three quick questions and see.
What Lexmark offers
Some current Lexmark models support Microsoft 365 OAuth with recent firmware. Older Lexmark MX and XM models often don't. Ask your dealer whether your exact model and firmware can do it: if it can, that's the cleanest fix.
If your Lexmark can't use OAuth
- Scan to a folder or OneDrive instead of email, if your staff don't mind the change.
- A Microsoft 365 connector, if your office has a static public IP address and someone to set it up.
- A local relay. Scan Relay, which I make, runs on any always-on office PC. You point the Lexmark at that PC instead of smtp.office365.com, and it passes each scan on to Microsoft 365 with modern sign-in. No firmware update, static IP or DNS changes. Free for 14 days, then $99 once per office.
Setting up the Lexmark for Scan Relay
- Install Scan Relay on a PC that stays on and sign in with the Microsoft 365 mailbox scans should come from.
- In the Lexmark's email settings, set the SMTP server to that PC's address (Scan Relay shows it), port 25, no SSL/TLS. Leave any username and password; Scan Relay ignores them.
- Send a test scan.
Test before the end of December, while the old way still works as a fallback. More detail is in the full guide. Copier dealers and IT providers can buy wholesale licenses.