Enterprise owners can now centrally control which MCP servers GitHub Copilot clients are allowed to run by using the new allowedMcpServers and deniedMcpServers keys in enterprise managed settings.
From the source
Enterprise owners can now centrally control which Model Context Protocol (MCP) servers GitHub Copilot clients are allowed to run by using the new allowedMcpServers and deniedMcpServers keys in enterprise managed settings.
github.blog