Turn off click to IM option
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\common\im Value name: turnoffclicktoim
Enabled: turnoffclicktoim = 1
Disabled: turnoffclicktoim = 0
Description
This policy setting allows you to remove the Instant Messaging (IM) option from the Contact Card and Outlook Ribbon. If you enable this policy setting the Instant Messaging icon does not appear on the Contact Card and Outlook Ribbon. If you disable or do not configure this policy setting the Instant Messaging icon appears on the Contact Card and Outlook Ribbon.