Microsoft spent the latter part of June fixing issues it introduces during the first part of the same month through delivery of its security updates. One are that caused great concern was for Microsoft Outlook. The company delivered fixes for Outlook 2010 and 2013 (see: Microsoft Fixes June Outlook Woes with End of Month Patch) but it took longer to make the fixes for Outlook 2016 available.
Those updates are available now:
Associated KB article: KB3213654
Looking for an awesome, no-nonsense technical conference for IT Pros, Developers, and DevOps? IT/Dev Connections kicks off in San Francisco in 2017!