Zoom Phone Systems to Microsoft Team Phone system migration

Question

I am planning to migrate the Zoom Phone system to Microsoft Teams Phone. As part of this migration, I intend to port phone numbers from Zoom (with Zoom acting as the current carrier) to Microsoft Teams.

I would like to confirm whether porting numbers directly from Zoom to Teams is supported, and to understand the end-to-end porting process, including any prerequisites.

I would like clarity on:

• Whether any specific Teams Phone licenses are required to initiate or complete number porting

If there are port-out charges or contractual considerations associated with bulk number migration

In total, there are 1,000 phone numbers to be ported. Out of these:

800 numbers will be assigned to users in Microsoft Teams

The remaining 200 numbers will be kept in an unassigned state and allocated only if required in the future

Please confirm:

Whether keeping numbers unassigned in Teams is supported

• If there are any license or rental charges applicable for unassigned numbersI am planning to migrate the Zoom Phone system to Microsoft Teams Phone. As part of this migration, I intend to port phone numbers from Zoom (with Zoom acting as the current carrier) to Microsoft Teams. I would like to confirm whether porting numbers directly from Zoom to Teams is supported, and to understand the end-to-end porting process, including any prerequisites. From the Zoom side, I would like clarity on:
  • Whether any specific Zoom Phone licenses are required to initiate or complete number porting
  • If there are port-out charges or contractual considerations associated with bulk number migration
  In total, there are 1,000 phone numbers to be ported. Out of these:
  • 800 numbers will be assigned to users in Microsoft Teams
  • The remaining 200 numbers will be kept in an unassigned state and allocated only if required in the future
  Please confirm:
  • Whether keeping numbers unassigned in Teams is supported
  • If there are any license or rental charges applicable for unassigned numbers

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Moved from: Microsoft 365 and Office

Answer 1

Hello @Rajasekar K,

Welcome to the Microsoft Q&A Forum, and thank you for sharing your concern with us. 

Based on the information you provided, it appears that you are looking for guidance on migrating from the Zoom Phone System to the Microsoft Teams Phone System. This is an important transition, and having the correct resources will ensure a smooth migration experience. 

To begin, we recommend reviewing the following articles from Zoom’s support resources, which explain how Zoom Phone interacts with Microsoft Teams and outline migration‑related considerations: 

• Managing Zoom Phone for Microsoft Teams: This resource provides an overview of how Zoom Phone works when integrated with Microsoft Teams, including configuration options and limitations. 
• How To Migrate Zoom Phone To Teams Phone: This article offers step‑by‑step guidance and important details about the migration process between the two systems. 

Please note that these links are from non-Microsoft websites. While the information appears to be accurate and safe, we encourage you to remain cautious. Some third‑party websites may display ads that promote software tools often categorized as Potentially Unwanted Products (PUPs). Before downloading or installing anything you encounter on those pages, we strongly advise conducting thorough research to ensure the product is legitimate and safe to use. 

For accurate, official, and tailored support, we highly recommend contacting Microsoft Support directly, as migrating phone systems often involves licensing validation, number porting considerations, tenant configuration, and backend checks. You can reach the appropriate team by following the link below: 

Contact the Telephone Number Services team | Microsoft Learn 

Once you have submitted a support request, please share the case number with us by updating the private message section located above the page title. This will allow us to follow up more efficiently and ensure you receive the proper assistance. 

We look forward to hearing from you and assisting you further with your migration process. 

Answer 2

Porting phone numbers from Zoom to Microsoft Teams is supported as part of the migration process to Microsoft Teams Phone. Here are the details regarding your queries:

1. Teams Phone Licenses: Specific Teams Phone licenses are required to initiate or complete number porting. You will need to ensure that you have the appropriate licenses for the users who will be assigned the ported numbers.
2. Port-out Charges and Contractual Considerations: It is essential to check with Zoom regarding any potential port-out charges or contractual obligations that may apply when migrating your numbers. These charges can vary based on your agreement with Zoom.
3. Keeping Numbers Unassigned: Microsoft Teams does support keeping numbers unassigned. You can port the 1,000 phone numbers and assign 800 to users while keeping the remaining 200 in an unassigned state for future allocation.
4. Charges for Unassigned Numbers: Regarding any license or rental charges applicable for unassigned numbers, it is advisable to consult Microsoft’s licensing policies or your Microsoft representative to clarify if there are any costs associated with holding unassigned numbers.

For a successful porting process, ensure you have all necessary information and documentation ready, and follow the guidelines provided by Microsoft for submitting a port request.

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References:

• Create a port order and transfer your phone numbers to Teams
• What's a port order? - Planning to transfer telephone numbers to Teams