As more and more government contractors move to the cloud and utilize Microsoft 365 GCC High to meet security and compliance requirements of NIST, DFARS, FAR and ITAR, Microsoft continues to add new features and functionality to increase feature parity between GCC High and Office 365 commercial.

Two new pieces of functionality have been much-awaited and are now released:

  1. Outlook for iOS and Android, and
  2. The addition of Teams.

Outlook For iOS And Android

Last month, Microsoft announced that the recently updated architecture for Outlook for iOS and Android meets the security and compliance needs of Office 365 US Government Community Cloud (GCC) High and Department of Defense customers.

In addition to FedRAMP Moderate compliance announced last year, all US government customers can now utilize Outlook mobile.

For customers operating GCC High or Department of Defense, Outlook for iOS and Android leverages the native Microsoft sync technology. This architecture meets GCC High and DoD requirements DISA SRG Level 4 (GCC-High) and Level 5 (DoD), Defense Federal Acquisition Regulations Supplement (DFARS), and International Traffic in Arms Regulations (ITAR), which have been approved by a third-party assessment organization and are FISMA compliant based on the NIST 800-53 rev 4.


The much-awaited roll out of Teams for GCC High is now complete. However, to accommodate the requirements of government cloud customers, there are some differences between Teams in Microsoft 365 Government – GCC High and Teams in the Enterprise plans.

Following are a few specific functions and their status for GCC High:

  • Channel message – available
  • Channel files – available
  • OneNote tab – on the Government backlog
  • Email a channel – not available
  • Add member – available
  • Guest access – on the Government backlog

Interested in learning more about GCC High and the steps your company should be taking to be in compliance? Contact C3 Integrated Solutions at or call us at 571-384-7950.