M365 Changelog: (Updated) Update to Get-CsPhoneNumberAssignment – Jan 9, 2025

Summary

The update to Get-CsPhoneNumberAssignment cmdlet limits phone number retrieval to 1,000 numbers per query, starting January 6, 2025. Rollout begins mid-January and ends late January 2025. Exceeding this limit will result in a "Bad request." Users should adjust their requests accordingly.

MC950880 – Updated January 9, 2025: Microsoft has updated the rollout timeline below. Thank you for your patience.

To maintain the best performance and reliability of our service, Microsoft is updating the page size limit for the phone number retrieval API (Get-CsPhoneNumberAssignment cmdlet) to a maximum of 1,000 numbers per query.

When this will happen:

General Availability (Worldwide, GCC): Microsoft will begin rolling out mid-January 2025 (previously early January) and expect to complete by late January 2025 (previously mid-January).

How this will affect your organization:

From January 6, 2025, any request with -Top parameter exceeding 1,000 will result in a “Bad request.” Please ensure that your Get-CsPhoneNumberAssignment requests do not surpass this limit. If the intended operation is to export your numbers, please use https://learn.microsoft.com/en-us/powershell/module/teams/export-csacquiredphonenumber?view=teams-ps

What you need to do to prepare:

Please ensure that your Get-CsPhoneNumberAssignment requests do not surpass this limit.

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