Disable Reading Pane Compose

Category

User Configuration > Administrative Templates > Microsoft Outlook 2016 > Outlook Options > Mail > Compose Messages

Scope

User

Registry Key

HKCU\software\policies\microsoft\office\16.0\outlook\message

Description

This policy setting allows you to control whether user’s responses to emails are composed inline on the reading pane or in a new window. If you enable this policy setting, responses to emails are composed in new windows. If you disable or do not configure this policy setting, responses to emails are composed inline in the reading pane.