Migrate Unified CM data to Webex Calling

Publisher

Cisco Systems, Inc. (Webex Help Center)

URL

https://help.webex.com/en-us/article/x974bd/Migrate-Unified-CM-to-Webex

Published

2026-04-27

Updated

unknown

Accessed

2026-09-04

HTTP status

200

License

Cisco proprietary documentation, all rights reserved; no-redistribution; short excerpts and locators only

Claims citing this source

• To assign a Webex Calling Standard license during a Unified CM migration, the documented path is to use a user CSV file and then the Migrate features from the Unified CM tool rather than the data migration tool. fact in context
• Users migrated from Unified CM to Webex Calling with the migration tool can be assigned only Calling Professional or CX Essentials licenses. fact in context
• Workspaces migrated from Unified CM to Webex using the migration tool can be assigned Workspace or Professional Workspace licenses. fact in context
• The Unified CM data migration flow is started in Control Hub under Services, Upgrades and Migrations, on the tile named Migrate Unified CM to Webex Calling. fact in context
• Members of group features such as shared lines, hunt groups, call queues, call park and call pickup must be migrated together in the same task rather than split across tasks. fact in context
• Within the Unified CM migration flow, users may only be assigned Calling Professional or CX Essentials licenses. fact in context
• Pre-migration processing produces a manifest .zip containing a CSV of device MAC addresses, which the administrator uses to update the phones back on Unified CM. fact in context
• Migration Insights, reached in Control Hub under Services, Upgrades and Migrations, is offered as the assessment step for deciding whether to migrate to Webex Calling. fact in context
• Number assignment behaviour during migration depends on the location's PSTN model: Local Gateway locations offer Add numbers to location, cloud PSTN locations offer Auto assign numbers, and mixed deployments require manual configuration with both options unavailable. fact in context
• Phones on Unified CM that are being migrated must be running Phone Load version 14.1 or later. fact in context
• All Unified CM end users must already be provisioned as Webex users, through Cisco Directory Connector or another mechanism, before the migration task runs. fact in context
• A single Unified CM to Webex Calling migration task can migrate at most 1000 users and 1000 devices; larger estates require multiple migration tasks. fact in context

Cite this source record

APA

WarmTransfer. (2026, April 27). Migrate Unified CM data to Webex Calling. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-help-x974bd-migrate-ucm-data-to-wxc

BibTeX

@misc{warmtransfer-cisco-help-x974bd-migrate-ucm-data-to-wxc,
  title  = {Migrate Unified CM data to Webex Calling},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-help-x974bd-migrate-ucm-data-to-wxc},
  note   = {Cisco Systems, Inc. (Webex Help Center), accessed 2026-09-04}
}