Specify default quality of compression done on inlined images inserted in Outlook

This policy setting allows you to specify default quality of compression done on inlined images in Outlook.

If you enable this policy setting, Outlook would compress the inlined images in the message as per the specified quality.

If you disable or don't configure this policy setting, inlined images would be compressed at the default quality (220 dpi).

Note: This policy setting only applies to subscription versions of Office, such as Microsoft 365 Apps for enterprise.

Default inline image compression quality for Outlook:

0. High Fidelity
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\16.0\common\mailsettings
   Value Name	oulookimagedpiindex
   Value Type	REG_DWORD
   Value	0

1. 330 ppi
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\16.0\common\mailsettings
   Value Name	oulookimagedpiindex
   Value Type	REG_DWORD
   Value	1

2. 220 ppi
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\16.0\common\mailsettings
   Value Name	oulookimagedpiindex
   Value Type	REG_DWORD
   Value	2

3. 150 ppi
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\16.0\common\mailsettings
   Value Name	oulookimagedpiindex
   Value Type	REG_DWORD
   Value	3

4. 96 ppi
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\16.0\common\mailsettings
   Value Name	oulookimagedpiindex
   Value Type	REG_DWORD
   Value	4