Table of Contents
Summary
- Microsoft is retiring support for several legacy Teams Phone devices that will no longer function post-retirement.
- Impacted devices will not be able to sign in, make, or receive calls.
- Hardware replacement is necessary, as there is no automatic upgrade path.
- Organizations should plan to replace affected devices and communicate this change to users.
- Review the Teams Phone certified hardware catalog for suitable replacement options.
Admin Impact: High
User Impact: Medium
Release Start: 01 Jun 2026
Release End: 01 Jun 2026
Services: Teams
Category: Plan for change
Tags: User Adoption, Admin Action, Retirement
History
3/17/2026 Item Added to Message Center
Microsoft Message
Introduction
Microsoft will retire support for several legacy Teams Phone devices that depend on authentication infrastructure reaching end of support. After this retirement, the affected devices will no longer be able to sign in or operate. This change improves security, service reliability, and alignment 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 calls, or receive calls.
How this affects your organization
Who is affected
- Organizations using any of the Teams Phone hardware models listed below.
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 no longer function as Teams‑certified hardware.
- No automatic upgrade path is available.
- Hardware replacement is required.
Impacted models include:
- Poly Trio 8500/8800
- Yealink T55/T55A
- 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 hardware inventory to identify impacted models.
- Plan to replace affected devices before June 1, 2026.
- Select replacement devices from the Teams Phone certified hardware catalog.
- Communicate the upcoming retirement to affected users and support teams.
- Update internal documentation to reflect this hardware retirement.
Upgrading ensures continued functionality, ongoing security updates, and access to the latest 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.