Table of Contents
Summary
- Support for certain legacy Teams Phone devices will be retired, preventing them from signing in or operating.
- Affected devices include Poly Trio, Yealink, and Crestron models listed in the message.
- Users will be unable to make or receive calls on the impacted devices.
- Replacement of these devices is necessary, as no automatic upgrade path will be available.
- Organizations should review their Teams Phone inventory and plan for device replacement before the retirement date.
Admin Impact: High
User Impact: High
Release Start: 01 Jun 2026
Release End: 01 Jun 2026
Services: Teams
Category: Plan for change
Tags: User Adoption, Admin Action, Retirement
History
2/9/2026 Item Added to Message Center
Microsoft Message
Introduction
Microsoft is retiring support for a set of legacy Teams Phone devices that rely on authentication infrastructure reaching end of support. These devices will no longer be able to sign in or operate after this retirement. This change supports our ongoing efforts to enhance security, maintain service reliability, and align devices with the Microsoft Modern Lifecycle Policy.
When this will happen
The retirement will take effect on June 1, 2026. After this date, impacted Teams Phone devices will no longer be able to sign in, make, or receive calls due to discontinued support.
How this affects your organization
Who is affected
Organizations using the Teams Phone models listed below will be impacted.
What will happen
- Impacted devices will no longer be able to sign in to Teams.
- Users will be unable to make or receive calls on these devices.
- Devices will stop functioning as Teams-certified hardware.
- No automatic upgrade path is available; hardware replacement is required.
Impacted models include:
- Poly Trio 8500/8800
- Yealink T55/55A
- Yealink T56/T56A
- Yealink T58/T58A
- Yealink CP960
- AudioCodes C448HD
- Yealink MP52
- Yealink VP59
- AudioCodes C450HD
- Crestron UC‑2
- Crestron UC‑P8
- Crestron UC‑P10
- Crestron UC‑P8‑C
- Crestron UC‑P10‑C
What you can do to prepare
To avoid service disruption:
- Review your Teams Phone inventory to identify impacted models.
- Plan to replace these devices before June 1, 2026.
- Select replacement models from the catalog of Teams Phone devices.
- Communicate upcoming changes to affected users and support teams.
- Update internal documentation to reflect device retirement.
- Upgrading ensures continued functionality, security updates, and access to new Teams Phone capabilities.
Learn more: Modern Lifecycle Policy | Microsoft Lifecycle Policy | Microsoft Learn
Compliance considerations
No compliance considerations identified. Review as appropriate for your organization.