Cisco's firmware conversion guide states that a phone must run enterprise firmware 14.2.1SR1 or later before conversion to multiplatform firmware, otherwise the documented procedures may not work.

Checked 2026-09-21

Your phone must run 14.2.1SR1 or later, otherwise the following procedures may not work.
Vendor
Cisco
Product
Cisco collaboration devices
Subsystem
endpoints
Deployment
on-premises
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-mpp-min-firmware. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-mpp-min-firmware

BibTeX

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

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