365 Message Encryption

January 28, 2024

Configuring Microsoft 365 Message Encryption (OME)

Date Published: January 28, 2024

This guide outlines how to configure Microsoft 365 Message Encryption (OME) using the Azure Information Protection (AIP) service. The steps include installing the required modules, connecting to the AIP service, and configuring onboarding policies to enable secure message encryption.

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Steps to Configure OME

1. Install the AIPService Module

To manage message encryption with the AIP service, install the necessary PowerShell module:

Install-Module -Name AIPService

Verify Installation

To list available commands in the installed module:

Get-Command -Module AIPService

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2. Connect to the AIP Service

Establish a session with the AIP service:

Connect-AipService

Verify Service Status

Check whether the AIP service is enabled or disabled:

Get-AipService

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3. Configure Onboarding Policies

Onboarding policies determine which groups can access AIP capabilities.

Steps to Configure

1. Retrieve the target security group:

   $group = Get-AzADGroup -DisplayName "_test aip user group"
   

2. Set the onboarding control policy:

   Set-AipServiceOnboardingControlPolicy -UseRmsUserLicense $True -SecurityGroupObjectId $group.id -Scope All
   

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4. Enable the AIP Service

Activate the AIP service to enable message encryption:

Enable-AipService

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Enhancements

Dynamic Group Configuration

Automate group retrieval by ensuring the script dynamically identifies the correct security group:

$groupName = "_test aip user group"
$group = Get-AzADGroup -DisplayName $groupName
if ($group) {
    Set-AipServiceOnboardingControlPolicy -UseRmsUserLicense $True -SecurityGroupObjectId $group.Id -Scope All
} else {
    Write-Host "Group '$groupName' not found." -ForegroundColor Red
}

Error Handling

Add error handling for critical steps:

try {
    Connect-AipService
    Write-Host "Connected to AIP Service successfully." -ForegroundColor Green
} catch {
    Write-Host "Failed to connect to AIP Service: $_" -ForegroundColor Red
}

Logging

Log configuration changes for auditing:

$logFile = "C:\Logs\AIP_Service_Log.txt"
function Log-Message {
    param ([string]$Message)
    $Timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
    "$Timestamp - $Message" | Out-File -FilePath $logFile -Append
}

Log-Message "AIP Service configuration started."

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Best Practices

1. Secure Group Membership:
   • Ensure the target security group includes only authorized users.
2. Enable License Enforcement:
   • Use the -UseRmsUserLicense parameter to enforce license compliance.
3. Monitor Service Status:
   • Regularly check the AIP service status with Get-AipService.
4. Backup Configuration:
   • Maintain a backup of onboarding policies and group configurations.

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