FN74203 gives the fix as upgrading to 12.5(1)SU8 or later, or 14SU3 or later, and configuring unified messaging with OAuth 2.0 client credentials flow; it recommends upgrading to Release 15.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco Unity Connection
- Subsystem
- unified messaging
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 12.5(1)SU8 and later; 14SU3 and later
- Checked
- 2026-09-30
Sources
- Field Notice: FN74203 - Cisco Unity Connection Unified Messaging with Microsoft 365, Voicemail Stored in Cisco Unity Connection Will Not Sync with Exchange Online (Outlook) Email Inbox - Software Upgrade Recommended — Cisco Systems · tier 2 current vendor documentation · Workaround/Solution
Cite this note
APA
WarmTransfer. (2026, September 30). Setting up Unity Connection single inbox with Microsoft 365: source note unity-connection-single-inbox-setup-fn74203-fix. WarmTransfer. https://warmtransfer.net/knowledge/claims/unity-connection-single-inbox-setup-fn74203-fix
BibTeX
@misc{warmtransfer-claim-unity-connection-single-inbox-setup-fn74203-fix,
title = {Setting up Unity Connection single inbox with Microsoft 365: source note unity-connection-single-inbox-setup-fn74203-fix},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/unity-connection-single-inbox-setup-fn74203-fix},
note = {Source note unity-connection-single-inbox-setup-fn74203-fix, checked 2026-09-30}
}