Problem
You need to customize the Encrypted email notification that is sent to the recipient of an encrypted email so suit the company’s branding/image.
Solution
Connect to the Office 365 Tenant via the Azure PowerShell Module. Use these commands
#Header: Set-OMEConfiguration -Identity "OME Configuration" -EmailText "Encrypted message from CompanyName secure messaging system." #Disclaimer: Set-OMEConfiguration -Identity "OME Configuration" -DisclaimerText "This message is confidential for the use of the addressee only." #Text that appears at the top of the encrypted mail viewing portal: Set-OMEConfiguration -Identity "OME Configuration" -PortalText "CompanyName secure email portal." #Logo: Set-OMEConfiguration -Identity "OME configuration" -Image (Get-Content "C:Users%username%Desktoplogo.png" –Encoding byte) #Supported file formats: .png, .jpg, .bmp, or .tiff #Optimal size of logo file: less than 40 KB #Optimal size of logo image: 170x70 pixels #Background color: Set-OMEConfiguration -Identity "OME Configuration" -BackgroundColor "#ffffff"