Instantly verify if an email belongs to a valid Microsoft 365 organization. Single or bulk
check — powered by parallel workers.
Single Email Verification
Enter an email address to check if it belongs to a Microsoft 365 organization
Bulk Email Verification
Paste emails, or upload a CSV / TXT file to verify them across parallel workers
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Safe Links Detection
Check if O365 accounts likely have Microsoft Defender Safe Links protection enabled.
Results are based on enterprise signals (federation, branding, FIDO, etc.).