Microsoft states that when a user's Teams client is offline or the device cannot reach the internet, for example in a network or power outage, emergency calls through Phone System are not supported and are not expected to work.

Checked 2026-09-25

Vendor
Microsoft
Product
Teams Phone with Calling Plans
Subsystem
Emergency calling
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-09-25
Checked
2026-09-25

Sources

Cite this note

APA

WarmTransfer. (2026, September 25). UC disaster recovery and business continuity: source note uc-disaster-recovery-teams-e911-offline. WarmTransfer. https://warmtransfer.net/knowledge/claims/uc-disaster-recovery-teams-e911-offline

BibTeX

@misc{warmtransfer-claim-uc-disaster-recovery-teams-e911-offline,
  title  = {UC disaster recovery and business continuity: source note uc-disaster-recovery-teams-e911-offline},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/uc-disaster-recovery-teams-e911-offline},
  note   = {Source note uc-disaster-recovery-teams-e911-offline, checked 2026-09-25}
}

Read in context