Turn off Send and Track feature

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

Registry

HKCU software\policies\microsoft\office\16.0\outlook\options\flagging

Value name: disablesenderflags

Enabled: disablesenderflags = 1

Disabled: disablesenderflags = 0

Description

By default, users can flag an e-mail that they send to help them remember to follow up on it later. The flag is not sent to the recipient. By enabling this setting, this feature is turned off.