The Spring 2016 quarterly updates for Exchange Server are now available on the Microsoft Download Center.
Exchange Server 2016 receives its first Cumulative Update. CU1 adds support for more languages in Outlook on the Web. The additional 17 languages will appear automatically in the language selection drop down after the update is installed.
With this release, Microsoft made a change to the update package type. Exchange 2016 updates will be released as ISO's, instead of self-extracting packages used to deliver service packs and cumulative updates for previous versions of Exchange Server. Why the change? Windows Server 2012 and later can mount ISO's directly and administrators have requested ISO's. Microsoft doesn't plan to release ISOs for Exchange Server 2013 Cumulative Updates unless enough people ask for it.
In other Exchange update news, Exchange Server 2013 Cumulative Update 12 is available. The Exchange Server 2007 and Exchange Server 2010 Update Rollups provide an updated OWA S/MIME control signed with a SHA-2 certificate.
For the full scoop and links to the downloads, see Released: March 2016 Quarterly Exchange Updates