Source note · SD-WAN considerations for voice
Microsoft says TLS termination or deep packet inspection of Microsoft 365 domains, and forcing protocol downgrade such as UDP to TCP, are untested scenarios known to cause connectivity issues.
Checked 2026-09-24
- Vendor
- Microsoft
- Product
- Microsoft 365 including Teams
- Subsystem
- network connectivity
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Microsoft 365 network connectivity principles — Microsoft · tier 2 current vendor documentation · Additional network considerations
Cite this note
APA
WarmTransfer. (2026, September 24). SD-WAN considerations for voice: source note sdwan-voice-m365-no-udp-downgrade. WarmTransfer. https://warmtransfer.net/knowledge/claims/sdwan-voice-m365-no-udp-downgrade
BibTeX
@misc{warmtransfer-claim-sdwan-voice-m365-no-udp-downgrade,
title = {SD-WAN considerations for voice: source note sdwan-voice-m365-no-udp-downgrade},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sdwan-voice-m365-no-udp-downgrade},
note = {Source note sdwan-voice-m365-no-udp-downgrade, checked 2026-09-24}
}