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MC1168291 Action Required: Migration to New Partner Application ID for Cloud Voicemail in Teams Calling

By: Author Alex Lim

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Categories Microsoft

Home » Microsoft » MC1168291 Action Required: Migration to New Partner Application ID for Cloud Voicemail in Teams Calling

Summary

  • The old Partner Application (00000004-0000-0ff1-ce00-000000000000) used for integrating Teams Calling Cloud Voicemails with on-premises or Hybrid Exchange servers will be disabled for security reasons.
  • Organizations must configure the new Partner Application ID (db7de2b5-2149-435e-8043-e080dd50afae) to avoid service disruptions, such as issues with Out of Office greetings and voicemail retrieval via IVR.
  • Steps to configure the new Partner Application ID include creating a new Mail User account, enabling the new Partner Application for Cloud Voicemail integration, and exporting and uploading the Exchange Server Auth Certificate.
  • The change carries both user and admin impacts, emphasizing the importance of action to prevent service disruptions.
  • No specific compliance considerations have been identified, but organizations are encouraged to review as necessary.

Admin Impact: High
User Impact: Low
Release Start: 13 Oct 2025
Release End: 13 Oct 2025
Services: Exchange, Teams
Category: Prevent or fix issues
Tags: User Adoption, Admin Action

History

10/8/2025 Item Added to Message Center

Microsoft Message

You are receiving this message because we have identified that your organization is still using the old Partner Application (00000004-0000-0ff1-ce00-000000000000) to integrate Teams Calling Cloud Voicemails with your on-premises Exchange or Hybrid Exchange server environment.

When this will happen

Please note that the old Partner Application will be progressively disabled starting October 13, 2025, for security reasons.

How this affects your organization

Failure to configure the new Partner Application ID will result in Out of Office greetings and voicemail retrieval via IVR no longer functioning.

What you can do to prepare

If the new Partner Application ID has not been configured correctly, this may cause service disruptions. To avoid any issues, please review and follow the steps outlined in the related message MC1158330 (September ’25) and enable the new Partner Application ID (db7de2b5-2149-435e-8043-e080dd50afae) on your Exchange servers by following these steps:

Step 1: Create a new Mail User account
Step 2: Create and enable a Partner Application for Cloud Voicemail integration to set up the new Partner Application
Step 3: Export the Exchange Server Auth Certificate
Step 4: Upload the Exchange Server Auth Certificate

Compliance considerations

No compliance considerations identified, review as appropriate for your organization.