GCC High

Choosing a GCC High Provider

tcollins@atlantech.net (Tom Collins) — Tue, 14 Apr 2026 08:29:45 GMT

What are the best Direct Routing providers for Microsoft Teams calling in a GCC High environment?

The best Direct Routing provider for a GCC High environment depends on the organization's size, compliance requirements, deployment timeline, and support expectations. The market has a small number of qualified providers because the certification and infrastructure requirements are significant.

GCC Eligibility and Configuration

tcollins@atlantech.net (Tom Collins) — Tue, 14 Apr 2026 08:28:36 GMT

Does my organization need GCC High if we handle CUI but are not directly subject to ITAR?

Handling CUI does not automatically require GCC High if the data is not subject to ITAR, EAR, or DFARS 252.204-7012 clauses. The specific regulatory obligation tied to the CUI determines which Microsoft cloud environment is appropriate, not the CUI designation alone.

GCC High Price and Licensing

tcollins@atlantech.net (Tom Collins) — Tue, 14 Apr 2026 08:27:29 GMT

How much does GCC High Teams calling cost?

GCC High Teams calling costs vary by organization size, number of users, provider selection, and deployment complexity. Pricing is not published as a standard rate card because multiple cost components combine to determine the total, and providers use different billing models.

GCC High Processes

tcollins@atlantech.net (Tom Collins) — Tue, 14 Apr 2026 08:26:30 GMT

Why is Direct Routing the only way to add PSTN calling to a GCC High tenant?

Direct Routing is the only PSTN option in GCC High because Microsoft Calling Plans and Operator Connect do not meet the data sovereignty, personnel screening, and compliance certification requirements of the GCC High environment. Microsoft has not made those services available for GCC High, and there is no announced timeline for that to change.

GCC High Compliance

tcollins@atlantech.net (Tom Collins) — Tue, 14 Apr 2026 08:25:13 GMT

If we are already in a GCC High tenant, does our existing phone system create a compliance gap?

An existing phone system running outside the GCC High boundary almost certainly creates a compliance gap. Legacy Private Branch Exchange (PBX) systems and commercial Voice over Internet Protocol (VoIP) services typically store call logs and metadata outside U.S. government-compliant data centers, lack FedRAMP High certification, and do not meet DFARS 7012 encryption requirements.

Teams Calling in GCC High

tcollins@atlantech.net (Tom Collins) — Tue, 14 Apr 2026 08:24:07 GMT

Why does Microsoft Teams calling require special handling in a GCC High environment?

Microsoft Teams calling in GCC High requires special handling because Microsoft does not offer Calling Plans or Operator Connect in the GCC High environment. Direct Routing through a compliant third-party voice provider is the only supported method for adding Public Switched Telephone Network (PSTN) calling to a GCC High tenant.

What is GCC High?

tcollins@atlantech.net (Tom Collins) — Tue, 14 Apr 2026 08:22:01 GMT