Just a quick note on how to check if a tenant domain is available in Office 365. This is not a Microsoft product or service. Visit http://o365.rocks. See if a .onmicrosoft.com subdomain is available with Office 365. Rate this:Electronically share this with another human:LinkedInTwitterFacebookMoreSkypeEmailPrintRedditGoogleTumblrPocketTelegramWhatsAppLike this:Like Loading... Related About the Author Turrem.tech Small business owner who loves using technology to share the Gospel of Jesus Christ for the joy of all peoples.