: Send an email with an inline image to an OWA user. Right-click the image and select Copy Image link —it should point to your new download domain. Summary of DNS Record Values Record Type Host / Name TXT @ or blank MS=msXXXXXXXX Verify Domain Ownership CNAME owa mail.domain.com Alias for easier OWA access
If you are managing an on-premises Exchange Server, "Download Domains" are used to isolate attachments and inline images for security (preventing script execution in OWA). owa domain.txt
: Navigate to the Microsoft 365 Admin Center under Settings > Domains . : Send an email with an inline image to an OWA user
Are you trying to in Microsoft 365, or are you troubleshooting attachment security on a local server? EnableDownloadDomains blocks picures in OWA : Navigate to the Microsoft 365 Admin Center
Download the specific domain.txt file provided in the setup wizard and upload it to the root folder of your website via FTP. Confirm : Return to the admin center and click Verify . 2. Configuring Download Domains (Security)