Merging Results

To create a multi-tenant report, run Maester against each tenant separately, save the JSON output, and merge them with Merge-MtMaesterResult.

PowerShell example

# Run Maester against three tenants and save JSON results
Connect-MgGraph -TenantId $tenantProduction
Invoke-Maester -PassThru -OutputJsonFile ./production.json
Disconnect-MgGraph

Connect-MgGraph -TenantId $tenantDevelopment
Invoke-Maester -PassThru -OutputJsonFile ./development.json
Disconnect-MgGraph

Connect-MgGraph -TenantId $tenantChina -Environment China
Invoke-Maester -PassThru -OutputJsonFile ./china.json
Disconnect-MgGraph

# Generate the multi-tenant HTML report
Merge-MtMaesterResult -Path *.json | Get-MtHtmlReport | Out-File ./MultiTenantReport.html

Merge-MtMaesterResult -Path loads the JSON files, validates them, and merges them into a single multi-tenant result — no manual file loading needed.

Alternative: use a directory or explicit file paths

# From a directory (auto-discovers TestResults-*.json, falls back to *.json)
Merge-MtMaesterResult -Path ./results/ | Get-MtHtmlReport | Out-File ./report.html

# Explicit file list
Merge-MtMaesterResult -Path ./production.json, ./development.json, ./china.json |
    Get-MtHtmlReport | Out-File ./report.html

Step by step

1. Connect and run - For each tenant, connect using Connect-MgGraph with the tenant ID (and -Environment for national clouds), then run Invoke-Maester with -OutputJsonFile to save the results as JSON.

2. Merge and report - Pass the file paths (or a directory/glob) to Merge-MtMaesterResult -Path. It loads each JSON file, validates the result structure, and creates a single object with a Tenants array. Pipe it into Get-MtHtmlReport to generate the report.

The report automatically detects the multi-tenant format and renders the tenant selector in the sidebar.

Loading results separately with Import-MtMaesterResult

If you need more control, use Import-MtMaesterResult to load the files first, then pipe them into Merge-MtMaesterResult:

Import-MtMaesterResult -Path *.json | Merge-MtMaesterResult | Get-MtHtmlReport | Out-File ./report.html

Import-MtMaesterResult returns an array of individual result objects. It also auto-expands multi-tenant merged JSON files (files with a Tenants array) back into individual results, so you can re-process previously merged outputs.

National clouds

When connecting to tenants in national clouds, pass the -Environment parameter to Connect-MgGraph:

Environment	Cloud
Global	Microsoft Azure Commercial (default)
China	Microsoft Azure China (21Vianet)
USGov	Microsoft Azure US Government (GCC High)
USGovDoD	Microsoft Azure US Government DoD
Germany	Microsoft Azure Germany