A 403 error indicates SSL is required by Exchange or Office 365 but the public CA certificates that signed the Exchange server certificates have not been uploaded to Unity Connection.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Unity Connection
- Subsystem
- single inbox
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15
- Checked
- 2026-10-02
Sources
- Troubleshooting Guide for Cisco Unity Connection Release 15 - Troubleshooting Unified Messaging — Cisco Systems · tier 2 current vendor documentation · Troubleshooting Unified Messaging > 403 error
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Unity Connection voicemail-to-email and notifications: source note unity-connection-notification-troubleshooting-um-403. WarmTransfer. https://warmtransfer.net/knowledge/claims/unity-connection-notification-troubleshooting-um-403
BibTeX
@misc{warmtransfer-claim-unity-connection-notification-troubleshooting-um-403,
title = {Troubleshooting Unity Connection voicemail-to-email and notifications: source note unity-connection-notification-troubleshooting-um-403},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/unity-connection-notification-troubleshooting-um-403},
note = {Source note unity-connection-notification-troubleshooting-um-403, checked 2026-10-02}
}