Connect my new Microsoft Enterprise Account to a Domain I own

Step-by-step guide to connecting your Microsoft 365 tenant to a custom domain

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Click Set up email with a custom domain

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Click Use a domain you already own

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Enter the domain you own

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Click Continue

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Use your DNS provider (in this case AWS Route 53)

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Add TXT record for domain verification

Need help verifying? Use the official guide:

Add your domain to Microsoft 365

Verify your domain in Microsoft 365

Once verified, you can assign licenses and start using Microsoft services like Exchange, Teams, and SharePoint with your domain.