What is BEMS?
BEMS provides additional services for BlackBerry Dynamics apps. BEMS integrates the following services: BlackBerry Mail, BlackBerry Connect, BlackBerry Presence, and BlackBerry Docs. When these services are integrated, users can communicate with each other using secure instant messaging, view real-time presence status of users in BlackBerry Dynamics apps, and access, synchronize, and share work file server and Microsoft SharePoint. The following table describes the services offered by BEMS.
source: https://help.blackberry.com/en/blackberry-enterprise-mobility-server/2.4/bems-install-and-config-html/obq1473258458065.html

STIG Update – DISA has released the BlackBerry Enterprise Mobility Server (BEMS) 2.x STIG Version 1
DISA has released the BEMS 2.x Security Technical Implementation Guide (STIG) Version 1. The requirements of the STIG become effective immediately. The STIG is available at https://iase.disa.mil/stigs/Pages/index.aspx.

For all STIG related questions, please contact the DISA STIG Customer Support Desk: disa.stig_spt@mail.mil