The IM button isn't enabled for all users in the contact card in Skype for Business 2015 (Lync 2013) Content provided by Microsoft Applies to: Skype for Business 2015Microsoft Lync 2013 Select Product Version All Products Symptoms When you try to send the an instant message (IM) to a contact by opening the Contact Card in Microsoft Skype for Business 2015 (Microsoft Lync 2013), you find that the IM button isn't available. Resolution To fix this issue, install the April 4, 2017, update (KB3178731) for Skype for Business 2015 (Lync 2013).Note Lync 2013 was upgraded to Skype for Business in April 2015. Last Updated: Apr 4, 2017 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.