
Today all certified phones used the same single Azure application ID, which is used as part the process for signing into Office 365. If you have SfB Certified IP Phones (3PIP) from AudioCodes, Crestron, Polycom or Yealink signing into to Skype for Business Online (or Microsoft Teams via cloud interop), you will need to firmware update them and take one time tenant admin steps to approve each vendor’s phones sign in to your Office 365 tenant (once per vendor) or they will fail to sign in after January 15, 2020.

15th May 2019 Update: The date has moved from July 1st 2019 to January 15, 2020.ġ2th January 2020 Update: The date has moved to 15th July 2020 – details here
