Release Notes for Cisco Unity Connection Release 15 Service Update 4

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/15/readme/b_15su4cucrn.html

Published

2026-06-08

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco documentation terms; no-redistribution; short excerpts and locators only

Source notes citing this source

• From Unity Connection 15SU4, Microsoft Graph API is the only supported option for Office 365 unified messaging integration because EWS is being deprecated. in context
• Unity Connection 15 Service Update 4 release notes were first published on June 8, 2026, and 15SU4 is version 15.0.1.14900-45. in context
• CSCwt99240, an open caveat in 15SU4, describes Mailbox Sync failing with an invalid Graph API URL after upgrade when Active Directory Site Name was not set to empty on the unified messaging service page before upgrading. in context
• CSCwu52456, a severity 2 open caveat in 15SU4, describes unified messaging not working with Graph API because of a parsing failure in the JSON response from Office 365. in context
• 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. in context
• The move to Microsoft Graph applies only to Office 365; Unity Connection integration with Exchange 2016 and Exchange 2019 continues to use Exchange Web Services. in context
• With Release 15SU4, Microsoft Graph API is the only supported option for Unity Connection integration with Office 365. in context
• The permissions on the Azure portal must be updated before upgrading Unity Connection to 15SU4 from any previous release. in context

Cite this source record

APA

WarmTransfer. (2026, June 8). Release Notes for Cisco Unity Connection Release 15 Service Update 4. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-relnotes-cuc-15su4

BibTeX

@misc{warmtransfer-cisco-relnotes-cuc-15su4,
  title  = {Release Notes for Cisco Unity Connection Release 15 Service Update 4},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-relnotes-cuc-15su4},
  note   = {Cisco Systems, accessed 2026-09-24}
}