Source note · Microsoft Teams Cloud Voicemail

If Exchange Online OpenDomainRoutingEnabled is True, voicemail Content-Class changes from Voice-CA to unauthenticatedVoice-CA and Teams cannot recognise the messages as voicemail; the fix is a Microsoft Support request to set it to False.

Checked 2026-09-25

Vendor: Microsoft
Product: Microsoft Teams Cloud Voicemail
Subsystem: troubleshooting
Deployment: multi-tenant
Region: not restricted
Release range: current as of 2026-09-25
Checked: 2026-09-25

Sources

Voicemail Messages Aren't Delivered in Teams or Skype for Business Client — Microsoft · tier 2 current vendor documentation · section 'Resolution for Symptom 1', paragraphs following 'Get-TransportConfig | fl OpenDomainRoutingEnabled'

Cite this note

APA

WarmTransfer. (2026, September 25). Microsoft Teams Cloud Voicemail: source note teams-cloud-voicemail-open-domain-routing. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-cloud-voicemail-open-domain-routing

BibTeX

@misc{warmtransfer-claim-teams-cloud-voicemail-open-domain-routing,
  title  = {Microsoft Teams Cloud Voicemail: source note teams-cloud-voicemail-open-domain-routing},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/teams-cloud-voicemail-open-domain-routing},
  note   = {Source note teams-cloud-voicemail-open-domain-routing, checked 2026-09-25}
}

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