Welcome
Deployment Guide
This document provides guidance for deploying the certificate enrollment infrastructure required for BigFix Mobile Configuration Management (MCM). It describes how to integrate BigFix MCM with Microsoft certificate services to enable device certificate enrollment using the Simple Certificate Enrollment Protocol (SCEP).
Certificate Enrollment Flow
This section describes the end-to-end certificate enrollment flow for devices managed by BigFix MCM, using MCM Proxy, NDES Proxy, and Microsoft Certificate Authority.

BigFix Documentation Homepage
Modern Client Management and BigFix Mobile
Welcome to the Modern Client Management and BigFix Mobile documentation, where you can find information about how to install, maintain, and use Modern Client Management and BigFix Mobile.
BigFix Mobile and MCM Overview
Discover how BigFix Mobile and Modern Client Management (MCM) extend unified endpoint management to mobile devices and modern OS platforms like iOS, Android, and Windows 10+, all from a single console.
Guides in PDF format
This section contains links to PDF versions of all the MCM and BigFix Mobile manuals.
Installing and Configuring BigFix Mobile and MCM
Read this guide to learn about the requirements and available installation scenarios to ensure that the deployment of BigFix MCM and BigFix Mobile goes smoothly in your environment.
Deployment Guide
This document provides guidance for deploying the certificate enrollment infrastructure required for BigFix Mobile Configuration Management (MCM). It describes how to integrate BigFix MCM with Microsoft certificate services to enable device certificate enrollment using the Simple Certificate Enrollment Protocol (SCEP).
- Deployment architecture
  The following diagram illustrates the deployment architecture for integrating BigFix MCM with the certificate enrollment infrastructure. It shows the key components involved in the certificate enrollment workflow, including Active Directory, Microsoft Certificate Authority (CA), Network Device Enrollment Service (NDES), NDES Proxy, LDAP Proxy, and BigFix components.
- Infrastructure prerequisites
  Before configuring certificate enrollment for BigFix MCM, ensure that the required infrastructure components and access permissions are available. The certificate enrollment workflow relies on integration between Active Directory, Microsoft Certificate Services, NDES, and BigFix components.The following prerequisites should be verified before proceeding with the configuration steps described in this guide.
- Active Directory setup
  Active Directory provides the directory services required for integrating Microsoft Certificate Authority (CA) and Network Device Enrollment Service (NDES). The following steps ensure that the Active Directory environment is properly prepared before configuring the certificate enrollment infrastructure.
- Certificate Authority (CA) Configuration
  The Microsoft Certificate Authority (CA) is responsible for issuing certificates requested through Network Device Enrollment Service (NDES) using the Simple Certificate Enrollment Protocol (SCEP).This section describes the required configuration on an existing Enterprise Certificate Authority to support certificate enrollment.
- SCEP Certificate Template Configuration
  A custom certificate template must be created to support SCEP-based certificate enrollment with required security and key configurations.
- NDES Installation and Configuration
- NDES Proxy Configuration
  This document provides step-by-step instructions for installing and configuring HAProxy as a proxy for the Network Device Enrollment Service (NDES), covering both challenge and certificate enrollment requests.
- LDAP Proxy Configuration
  This section provides step-by-step instructions to install and configure OpenLDAP as an LDAP proxy on RHEL 8.
- BigFix Configuration for Certificate Enrollment
  This section describes how to configure BigFix MCM to integrate with the certificate enrollment infrastructure using NDES Proxy and LDAP Proxy.
- SCEP Profile Configuration in BigFix
  This section describes how to create and configure a SCEP profile in BigFix MCM to enable device certificate enrollment using the configured NDES Proxy infrastructure.
- Communication Ports and Network Flow
  This section describes the network communication paths and required ports between components involved in the certificate enrollment workflow for BigFix MCM.
- Certificate Enrollment Flow
  This section describes the end-to-end certificate enrollment flow for devices managed by BigFix MCM, using MCM Proxy, NDES Proxy, and Microsoft Certificate Authority.
Quick Start
This quick start guide gets you up and running with your BigFix MCM and BigFix Mobile solution. It helps you secure, configure, and manage your mobile devices quickly and efficiently.
User Guide
Administrator Guide
Read this guide to learn about enrolling, administering, and troubleshooting endpoints through BigFix MCM and BigFix Mobile.
Glossary
This glossary provides terms and definitions for the BigFix software and products.

Certificate Enrollment Flow

This section describes the end-to-end certificate enrollment flow for devices managed by BigFix MCM, using MCM Proxy, NDES Proxy, and Microsoft Certificate Authority.

Step-by-Step Enrollment Flow

Policy Deployment
- BigFix MCM deploys the SCEP profile to the target device
- The profile contains:
  - SCEP URL (pointing to MCM Proxy)
  - Subject details
  - Key configuration and more
Challenge Password Retrieval
- BigFix MCM server requests a challenge password from the NDES Admin endpoint through NDES Proxy
```
http://<ndes-admin>/certsrv/mscep_admin
```
- The challenge password is injected into the SCEP payload before being sent to the device.

Device Initiates Certificate Request
- The device generates a key pair (RSA 4096) locally.
- The device sends a SCEP request to the MCM Proxy:
```
https://<mcm-server>/mscep_proxy
```

MCM Proxy Forwards Request
- MCM Proxy forwards the request to the NDES Proxy.
NDES Proxy Forwards Request
- NDES Proxy securely forwards the request to the NDES server.
- Provides isolation between external access and internal infrastructure.
NDES Processes Request
- NDES validates the challenge password.
- Maps the request to the configured certificate template.
- Submits the request to the Certificate Authority (CA).
Certificate Authority Issues Certificate
- CA validates the request based on:
  - Template configuration
  - Permissions
- CA signs and issues the certificate.
Certificate Response Flow
- CA → NDES → NDES Proxy → MCM Proxy → Device
- The issued certificate is returned back to the device
Certificate Installation on Device
- The device installs the certificate
- The certificate can now be used for:
  - Authentication
  - Wi-Fi / VPN access
  - Identity-based access control