Tenants whose Conditional Access location exclusions for bulk sign-in were set up before 1 January 2026 and list only the original six service IPs are likely to see bulk sign-in blocked by Conditional Access until the twelve additional IPs are added.
inferred · Checked 2026-09-30
- Vendor
- Microsoft
- Product
- Microsoft Teams Phone
- Subsystem
- SIP Gateway authentication
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- from 2026-01-01
- Status
- inferred
- Checked
- 2026-09-30
Sources
- Configure SIP Gateway — Microsoft · tier 2 current vendor documentation · Configure conditional access, Note and Starting 1st January 2026 list
Cite this note
APA
WarmTransfer. (2026, September 30). Setting up SIP Gateway for Cisco and Poly phones on Teams: source note teams-sip-gateway-setup-ca-2026-ips-stale-risk. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-setup-ca-2026-ips-stale-risk
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-setup-ca-2026-ips-stale-risk,
title = {Setting up SIP Gateway for Cisco and Poly phones on Teams: source note teams-sip-gateway-setup-ca-2026-ips-stale-risk},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-setup-ca-2026-ips-stale-risk},
note = {Source note teams-sip-gateway-setup-ca-2026-ips-stale-risk, checked 2026-09-30}
}