Assume that you deploy Microsoft Exchange Server 2010 with Microsoft Skype for Business Server 2015. After you upgrade Microsoft Lync 2013 to Skype for Business, event ID 32054 that resembles the following floods the Event Viewer on the Skype server:
This issue occurs because Exchange Server 2010 doesn't support certain Microsoft Unified Communications Web API (UCWA) that's used by Skype.
Article ID: 3203147 - Last Review: Nov 14, 2016 - Revision: 1
Skype for Business Server 2015