Do not compress the inlined images inserted in Outlook

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKCU software\policies\microsoft\office\16.0\common\mailsettings

Value name: outlookdonotcompressimages

Enabled: outlookdonotcompressimages = 1

Disabled: outlookdonotcompressimages = 0

Description

This policy setting allows you to disable compression on inlined images in Outlook. If you enable this policy setting, Outlook won't compress inlined images in the message. If you disable or don't configure this policy setting, inlined images would be compressed. Note: This policy setting only applies to subscription versions of Office, such as Microsoft 365 Apps for enterprise.