Source note · Microsoft Teams Cloud Voicemail
Exchange mail flow (transport) rules are a documented cause of undelivered voicemail, for example rules that mark messages with MP3 attachments as spam or act on SPF failures; voicemail with SPF failures still reaches Exchange but such rules can keep it out of the mailbox.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Microsoft Teams Cloud Voicemail
- Subsystem
- troubleshooting
- Deployment
- multi-tenant, hybrid
- 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', bullet 'Exchange mail flow rules'
Cite this note
APA
WarmTransfer. (2026, September 25). Microsoft Teams Cloud Voicemail: source note teams-cloud-voicemail-mail-flow-rules-cause. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-cloud-voicemail-mail-flow-rules-cause
BibTeX
@misc{warmtransfer-claim-teams-cloud-voicemail-mail-flow-rules-cause,
title = {Microsoft Teams Cloud Voicemail: source note teams-cloud-voicemail-mail-flow-rules-cause},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-cloud-voicemail-mail-flow-rules-cause},
note = {Source note teams-cloud-voicemail-mail-flow-rules-cause, checked 2026-09-25}
}