After you install update 2874216, you experience the following issues in Microsoft Exchange Server 2013: Note
You do not experience these symptoms after you install the Exchange 2007 or Exchange 2010 versions of the MS13-061 security update.
- The content index (CI) for mailbox databases shows "Failed" on the affected server.
- The Microsoft Exchange Search Host Controller service is missing.
- You see a new service that is named "Host Controller service for Exchange."
Update 2874216 is described in security update MS13-061
To work around this problem, update the following registry entries.