Direct Routing requires users to be in Teams Only mode so that incoming calls land in the Teams client, which is done by assigning the UpgradeToTeams instance of TeamsUpgradePolicy.

Checked 2026-09-21

Vendor
Microsoft
Product
Teams Phone
Subsystem
user-enablement
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-09-21
Checked
2026-09-21

Sources

Cite this note

APA

WarmTransfer. (2026, September 21). CUCM to Teams Phone migration: source note cucm-to-teams-phone-users-teams-only-required. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-users-teams-only-required

BibTeX

@misc{warmtransfer-claim-cucm-to-teams-phone-users-teams-only-required,
  title  = {CUCM to Teams Phone migration: source note cucm-to-teams-phone-users-teams-only-required},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-users-teams-only-required},
  note   = {Source note cucm-to-teams-phone-users-teams-only-required, checked 2026-09-21}
}

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