Source note · Troubleshooting Teams phone sign-in and provisioning
The Teams upgrade configuration setting BlockLegacyAuthorization, when enabled, prevents Teams phones from connecting to Teams services; its state can be checked with Get-CsTeamsUpgradeConfiguration.
Checked 2026-09-30
- Vendor
- Microsoft
- Product
- Teams phones
- Subsystem
- Teams upgrade configuration
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- Authentication best practices for Teams phones — Microsoft · tier 2 current vendor documentation · Teams Legacy Authorization
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting Teams phone sign-in and provisioning: source note teams-phone-sign-in-troubleshooting-block-legacy-auth. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-phone-sign-in-troubleshooting-block-legacy-auth
BibTeX
@misc{warmtransfer-claim-teams-phone-sign-in-troubleshooting-block-legacy-auth,
title = {Troubleshooting Teams phone sign-in and provisioning: source note teams-phone-sign-in-troubleshooting-block-legacy-auth},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-phone-sign-in-troubleshooting-block-legacy-auth},
note = {Source note teams-phone-sign-in-troubleshooting-block-legacy-auth, checked 2026-09-30}
}