The ExternalAccessPrefix and OptimizeDeviceDialing parameters have been removed from New-CsTenantDialPlan and Set-CsTenantDialPlan; external access dialing is now handled through normalization rules, and Get-CsTenantDialPlan shows any external access prefix as a normalization rule.

Checked 2026-09-30

Vendor
Microsoft
Product
Microsoft Teams Phone
Subsystem
dial-plan
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-09-30
Checked
2026-09-30

Sources

Cite this note

APA

WarmTransfer. (2026, September 30). Setting up Teams voice routing policies and dial plans: source note teams-voice-routing-setup-ext-prefix-removed. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-voice-routing-setup-ext-prefix-removed

BibTeX

@misc{warmtransfer-claim-teams-voice-routing-setup-ext-prefix-removed,
  title  = {Setting up Teams voice routing policies and dial plans: source note teams-voice-routing-setup-ext-prefix-removed},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/teams-voice-routing-setup-ext-prefix-removed},
  note   = {Source note teams-voice-routing-setup-ext-prefix-removed, checked 2026-09-30}
}

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