State of knowledge

March 2013

This article explains how to solve the problems that occur since updating to a newer version of Skype from Microsoft.

Microsoft Skype overwrites the setting for the default instant messaging program. This causes presence display problems in Microsoft Outlook version 2010 or later and Skype is also used as the default dialing application.


The presence problem can be solved by editing the following registry keys:

up to ProCall Enterprise Version 6.4

HKEY_CURRENT_USER\SOFTWARE\IM Providers\DefaultIMApp = [REG_SZ] = ProCall


from ProCall Enterprise Version 6.41:

[HKEY_CURRENT_USER\SOFTWARE\IM Providers] "DefaultIMApp"= [REG_SZ] = OLPPsCOM


Example screenshot


There is often a problem that the standard telephony software has been changed on the Microsoft Windows level. This is reset to ProCall via the following registry key:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Telephony\HandoffPriorities\RequestMakeCall = [REG_SZ] = DIALIT32.exe

The value that is on the far left of this key is at the front in priority. Dialit32.exe is the correct value:


You will find another approach on the following page:

http://www.slipstick.com/outlook/contacts/calling-from-an-outlook-contact-does-not-work/