Microsoft 365 diagnostics
Microsoft 365 diagnostics
Microsoft 365 and Entra ID tools for tenant discovery, email authentication, cloud administration, service health, and everyday technician troubleshooting.
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Microsoft 365 Audit Planner
Premium tenant assessment, scoring, remediation planning, and PowerShell collection scripts.
Open premium planner →🏢Tenant Name Checker
Check whether an onmicrosoft.com tenant namespace appears to exist in Microsoft Entra.
Open checker →☁️
Microsoft 365 admin shortcuts
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Technician notes
Use this page as a quick-launch hub for Microsoft cloud diagnostics, tenant checks, security portals, and administration resources.
Tenant checker results are informational. Microsoft tenant creation is the final authority for namespace availability.