The "Skype Call" text label is now replaced by "Skype for Business Call" in the following scenarios in Microsoft Lync 2013 (Microsoft Skype for Business):
Scenario 1, the display of the "Skype Call" text label in Quick menu:
Scenario 2, the display of the "Skype Call" text label from Contacts list by pressing and holding (or right-clicking) the group that you want to have a call:
Scenario 3, the display of the "Skype Call" text label from Voice Mail:
How to apply this update
To apply this update, install the September 8, 2015 security update (KB3085500) for Lync 2013 (Skype for Business).
Note Lync 2013 was upgraded to Skype for Business in April 2015.