Migrate Unified CM to Webex - An Overview
Migrate Unified CM settings for users, devices, numbers, and locations to Webex Calling platform for a better user experience and also to leverage the enterprise-grade Cisco Webex cloud calling, mobility, messaging, and calling services. The migration automates the firmware license generation, verifies the device eligibility, and assigns phone numbers to users and devices for Webex calling services.
Prerequisites
Before you start your migration, make sure that you meet the following requirements:
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Access Cisco Webex Control Hub as an organization administrator. For more information, see Assign Organizational Account Roles in Cisco Webex Control Hub.
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Create Webex Locations with PSTN assigned for each Location. For more information, see Configure Cisco Webex Calling for Your Organization.
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Obtain the BAT/CSV files for the Unified CM users and devices. For more information, see Cisco Unified Communications Manager Bulk Administration Tool (BAT) .
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Ensure phones on Unified CM that you are migrating are using Phone Load version 14.1 or later. For more information, see Install or Upgrade Cisco IP Phone Firmware.
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Identify any DNs from Unified CM that are mapped to multiple Device Pools in Unified CM. This tool cannot migrate these DNs. You can use Add and Assign Devices in Bulk for migration.
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Ensure all your end users from Unified CM are provisioned as Webex Users via Cisco Directory Connector or other means. For more information, see User and Contact Synchronization and Install Cisco Directory Connector.
Import Users Using the Bulk Administration Tool (BAT)
Use the Bulk Administration Tool (BAT) in Cisco Unified Communications Manager application to export users from Unified CM, and later import to Control Hub and Webex Users. Complete these steps to import the users:
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Select Bulk Administration > Import/Export > Export to export the contact lists of the migrating users from the current home cluster. The Export Data window displays.
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Choose Select All in the Select items to Export section. |
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Choose a filename for the exported list data. In the Job Description field, enter the description that you want to provide for the job. Export Configuration is the default description. ![]() |
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Click Run Immediately or schedule the job to run later. Click Submit. |
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Monitor the status of the export job. Use the Job Scheduler option in the Bulk Administration main menu to schedule and/or activate this job. ![]()
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Download the export file and store it for use later when the user migration is complete. Choose Cisco Unified CM IM and Presence Administration > Bulk Administration > Upload/Download Files. From the Upload/Download window select the tar file and click on Download Selected. ![]() |
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Un-tar the .tar file to any location on your machine using the tar -xvf command. Extract the .csv file to the specified location. See the Cisco Unified Communications Manager Bulk Administration Guide for detailed information. |
Task Flow

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From the customer view in Cisco Webex Control Hub, go to Services > Migrations. On the Migrate Unified CM to Webex card, click Get started. The Update Unified CM deployment to Webex Cloud Calling page
appears.
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Click Step 1: Review upgrade prerequisites to view the list of prerequisites. |
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Read and complete all the prerequisite tasks before you proceed. For more information, see Migrate Unified CM to Webex - An Overview. |
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From the Migrate Unified CM to Webex Calling page, go to Import data text box. |
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Choose one of the following options to import the files:
After the files are imported, you can view the details, such as the total number of
users, devices and phone numbers on the page. You can't proceed if the upload is
not successful.
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Click the More information ellipsis⋮ icon and choose one of the following options:
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From the Update Unified CM deployment to Webex Cloud Calling page, go to Step 3 Migrate to Webex Calling and click Create a new task. The New Migration Task page appears.
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Enter the name of the task in the Task name field. The task name should contain a minimum of 8 characters. Provide a unique task name for your migration task.
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Click Next. The Map device pools to locations page appear.
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You cannot migrate Unified CM DNs that are mapped to multiple Device Pools using this tool, in this release. You must bulk provision the numbers through Webex Calling using the CSV file. |
If you do not want to include a location in this task, you can leave it undefined. For more information, see Configure Cisco Webex Calling for Your Organization.
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You can view the following details in the Map device pool to locations page:
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Click the Search field and type the device pool or location to filter and view the respective data. |
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Click the Webex Calling Location drop-down list to choose a location. If you want to assign a location to the device pool later, you can
choose Undefined from the Webex Calling
Location drop-down list.
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Click Next. The Select locations page appears.
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After an association is made between the device pool and locations, the backend system creates an E.164 prefix, phone number and extension range, partition, and the total number of lines for each E.164 prefix. Each location contains the devices and the total number of lines that are already mapped. Make sure that the phone numbers and extensions are assigned to the correct location, and then choose locations that you want to include in the migration task.
You can use the Search field to search for the locations or click the All (Locations) drop-down list to choose a location.
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On the Select location page, click the expand icon next to a location to view the location details. The location details are based on the assigned device pool. Each location contains a common prefix, Unified DN range of phone numbers and
extensions, UCM partition, warnings/errors, and total number of lines.
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To move the total number of lines from one location to another, click the ellipsis ⋮ icon next to the No.of lines and choose the location from the listed location options. The number of lines are added to the new location.
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Click the Actions button on the screen to expand and collapse the location details. |
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To include the locations that you want to include to the migration task, check the check boxes next to the locations, and click Next. The Manage numbers in location page appears.
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On the Manage numbers in Location page, the following details appear:
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View and download the phone number status:
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Click Next. The Assign Numbers to Users or Workspaces page appears.
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On the Assign numbers to a user or workspace page, the following details appear:
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To assign a Webex phone number to a workspace, click the row and select Edit, to enable the workspace toggle option on the Workspace column. |
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To assign a Webex phone number to a user, perform the following:
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Click Actions to use the Export and Import functions and modify the records. |
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Click Next. The Check device eligibility page appears.
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On the Assign devices to a user or workspace page, the following details appear:
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To update the MAC address of the device or modify the device model, click the device row, click the edit icon and then modify the MAC address on the Device MAC text box. |
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Click Actions to use the Export and Import functions and modify the records. |
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Click Next, the Review page appears. |
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Click Show list next to the excluded or included items to expand and view the details about the reason for inclusion or exclusion. |
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Choose one of the following options:
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Click Prepare to Migrate. The Ready for migration page appears. The migration tool does
these pre-migration activities:
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Click Close. The Migrate Unified CM to Webex Calling page appears with a
list of tasks that are in different status.
The following table lists the task status and description:
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Click Complete migration to download the manifest file
in .zip format which contains MAC address of phones in a |
You need to log into Cisco Unified Communications Manager and upload the CSV file with the device details to start the migration. Make sure that you’ve the CSV file that contains the user and phone details that you want to import from Unified CM to Webex Cloud calling service.
Upload Files
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Log in to Cisco Unified Communications Manager. |
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From Cisco Unified CM Administration, go to Bulk Administration > Upload/Download Files. |
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Click Add New. The File Upload Configuration window appears.
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In the File text box, enter the full path of the file to upload from the downloaded manifest file or click Browse and locate the file. |
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From the Select the Target drop-down list, choose the target as Phone. |
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From the Transaction Type drop-down list, choose the transaction type as Update Phone - Custom File. |
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Check the Overwrite File if it Exists check box, if you want to overwrite an existing file with the same name. |
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Click Save. The upload status appears.
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Repeat steps 4 to 8 for all the generated files. |
Migrate Phones
Use this procedure to migrate users and devices without an Enterprise license. The migration tool automatically converts the license of these users and devices.
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From Cisco Unified CM Administration, choose Bulk Administration > Phones > Update Phones > Custom File. The Update Phones Custom Configuration page appears.
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From the Update Bulk Phone Template where drop-down list, choose Device Name. |
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Click Find. The phones that are listed in the files, if available, appear on this page. |
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Click Next. |
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Check the required parameters check boxes and update the details such as description, phone load name, load server, and so on, in the respective fields. |
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From the Job Information section, choose one of the following options.
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Click Submit. |
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Repeat steps 1 to 7 for all the generated files. |
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To view the status of the submitted job, go to Cisco Unified CM Administration, choose Bulk Administration > Job Scheduler. |
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Select your job to view the job status. |