How to upgrade an existing Exchange Server 2013 deployment to Service Pack 1.
Exchange Server 2013 Service Pack 1 Released
Microsoft has announced the release of Exchange Server 2013 Service Pack 1, containing several new features, improvements, and bug fixes.
Microsoft Releases Update Rollup 4 for Exchange 2010 SP1
Microsoft has announced the release of Update Rollup 4 for Exchange Server 2010 Service Pack 1 that is now available for customers to download.