Can UK and US MS Teams voice numbers be transferred from a UK 365 tenant to a Japanese tenant?

Question

Can UK and US MS Teams voice numbers be transferred from a UK 365 tenant to a Japanese tenant?

Phillip Holmes 0

We want to know if our existing MS provided UK, US and Europe numbers can be migrated from. UK M365 to a Japanese M365 tenant.

According to https://learn.microsoft.com/en-us/microsoftteams/phone-number-calling-plans/transfer-phone-numbers-to-teams?tabs=new-porting-wizard Japan is a valid destination.

However, when we test in our tenant Japan is not available.

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Answer 1

Henry-N 10,850 Microsoft External Staff Moderator

Hi @Phillip Holmes,

Thank you for posting your question in the Microsoft Q&A forum.

Regarding your inquiry about transferring Microsoft-provided voice numbers from a UK tenant to a Japanese tenant:

Based on my experience and the research I’ve done, Japan does not have Microsoft Calling Plans available. Calling Plans are a prerequisite for submitting a port‑in request, which is why Japan does not appear as an option in the porting wizard. The porting tool only displays countries where Microsoft actively sells Calling Plans, and Japan is not included in that list.

User's image For your reference, you can review the availability information here: Availability in Japan | Microsoft Learn

If you would like official confirmation, you can contact the Telephone Number Services (TNS) – Service Desk. The steps for reaching them are described in this article: Contact the Telephone Number Services team | Microsoft Learn

Thank you again for your time and understanding. While this may not fully resolve your situation immediately, I’m happy to help gather any additional details or explore alternative solutions if needed. Your patience is greatly appreciated, and I’m here to support you.

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Henry-N 10,850 Reputation points Microsoft External Staff Moderator

2026-02-17T15:23:27.7766667+00:00

Hi @Phillip Holmes,
I hope you're doing well. I just wanted to follow up and see if you’ve had a chance to review my previous reply. If possible, it would be incredibly helpful if you could share a bit more detailed update of the issue. Thank you so much for your cooperation we truly appreciate your time and effort. Looking forward to hearing from you soon.
Phillip Holmes 0 Reputation points

2026-02-18T09:30:17.57+00:00

Thanks Henry-N,

I spoke with the TNS service desk, they were 100% confident the numbers can be migrated, but pointed out different licenses will be needed as the ones we currently use are not available in Japan.

They directed me to sales, who said much the same thing.

The Japanese tenant does already use telephony.

We're going to test creating UK/US numbers in the Japanese tenant, and then test migrating a UK/US number to confirm.
Henry-N 10,850 Reputation points Microsoft External Staff Moderator

2026-02-19T07:17:35.0666667+00:00

Hi @Phillip Holmes,

Thanks again for the update and I’m glad you were able to get clarification from both TNS and Sales.

Please take your time with the testing there’s no need to rush at all. If there is any new update on the issue, feel free to share it here I’m always happy to help.
Thank you again for your time and understanding.

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Can UK and US MS Teams voice numbers be transferred from a UK 365 tenant to a Japanese tenant?

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