Microsoft has been progressively disabling the legacy Skype for Business Online first-party application (00000004-0000-0ff1-ce00-000000000000) since 13 October 2025, replacing it with dedicated Teams Calendar Scheduler and Cloud Voicemail applications.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams
- Subsystem
- Exchange Server integration
- Deployment
- hybrid
- Region
- not restricted
- Release range
- from 2025-10-13
- Checked
- 2026-10-02
Sources
- Integration between Microsoft Teams services and Exchange Server — Microsoft Learn · tier 2 current vendor documentation · Step 7: Disable or remove the legacy Skype for Business Online application
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Teams Phone voicemail that is not reached or not delivered: source note teams-voicemail-troubleshooting-legacy-sfbo-app-disabled. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-voicemail-troubleshooting-legacy-sfbo-app-disabled
BibTeX
@misc{warmtransfer-claim-teams-voicemail-troubleshooting-legacy-sfbo-app-disabled,
title = {Troubleshooting Teams Phone voicemail that is not reached or not delivered: source note teams-voicemail-troubleshooting-legacy-sfbo-app-disabled},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-voicemail-troubleshooting-legacy-sfbo-app-disabled},
note = {Source note teams-voicemail-troubleshooting-legacy-sfbo-app-disabled, checked 2026-10-02}
}