Does GCC High work with Teams Phone?

GCC High works with Teams Phone, but only through Direct Routing. Microsoft Calling Plans and Operator Connect are not available in the GCC High environment. Organizations must use a third-party voice provider with a Microsoft-certified SBC to connect Teams Phone to the PSTN.

The provider deploys and manages the SBC infrastructure on behalf of the customer, connecting the GCC High Teams environment to PSTN calling services through compliant U.S.-based pathways. Once configured, users get full Teams Phone capabilities, including inbound and outbound PSTN calling, call queues, auto attendants, enterprise dial plans, dynamic E911 location routing, call reporting, and call recording. Audio conferencing in GCC High is also delivered exclusively through Direct Routing, which means the provider supplies dial-in phone numbers rather than Microsoft. Teams Phone in GCC High requires either a Microsoft 365 E5 GCC High license (which includes Teams Phone) or a Microsoft 365 E3 GCC High license with a separate Teams Phone add-on.