The 15SU4 release notes state that the Graph API migration applies only to Office 365, and that integrations with Exchange 2016 and Exchange 2019 continue to use EWS.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Unity Connection
- Subsystem
- single inbox
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15SU4 and later
- Checked
- 2026-10-02
Sources
- Release Notes for Cisco Unity Connection Release 15 Service Update 4 — Cisco Systems · tier 2 current vendor documentation · Release Notes 15SU4 > Microsoft Graph API support for Office 365
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Unity Connection voicemail-to-email and notifications: source note unity-connection-notification-troubleshooting-su4-onprem-ews. WarmTransfer. https://warmtransfer.net/knowledge/claims/unity-connection-notification-troubleshooting-su4-onprem-ews
BibTeX
@misc{warmtransfer-claim-unity-connection-notification-troubleshooting-su4-onprem-ews,
title = {Troubleshooting Unity Connection voicemail-to-email and notifications: source note unity-connection-notification-troubleshooting-su4-onprem-ews},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/unity-connection-notification-troubleshooting-su4-onprem-ews},
note = {Source note unity-connection-notification-troubleshooting-su4-onprem-ews, checked 2026-10-02}
}