Domain Checker

The Domain Checker tool helps you quickly verify if a domain is connected to a Microsoft 365 tenant. This can be useful for:

• Administrators setting up new tenants
• Consultants verifying domain availability
• IT professionals troubleshooting domain issues

Note: For demonstration purposes, this tool simulates API responses. Domains like microsoft.com, outlook.com, github.com, and domains ending with .onmicrosoft.com will show as connected.