Microsoft states that client SMTP submission with Basic authentication in Exchange Online is scheduled for deprecation. Its listed alternatives are High Volume Email (internal recipients), Azure Communication Services Email, or relaying through an on-premises mail server.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Exchange Online
- Subsystem
- SMTP client submission
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- How to set up a multifunction device or application to send email using Microsoft 365 or Office 365 — Microsoft · tier 2 current vendor documentation · Client SMTP submission > Note on Basic authentication deprecation
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Unity Connection voicemail-to-email and notifications: source note unity-connection-notification-troubleshooting-m365-basic-dep. WarmTransfer. https://warmtransfer.net/knowledge/claims/unity-connection-notification-troubleshooting-m365-basic-dep
BibTeX
@misc{warmtransfer-claim-unity-connection-notification-troubleshooting-m365-basic-dep,
title = {Troubleshooting Unity Connection voicemail-to-email and notifications: source note unity-connection-notification-troubleshooting-m365-basic-dep},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/unity-connection-notification-troubleshooting-m365-basic-dep},
note = {Source note unity-connection-notification-troubleshooting-m365-basic-dep, checked 2026-10-02}
}