The software giant is readying the Office 2010 SP1 release alongside the general availability launch of Office 365. Microsoft had previously promised Office 2010 SP1 “by the end of June.” WinRumors understands, from sources familiar with Microsoft’s plans, that the SP1 download will be made available at 9AM PST on Tuesday June 28. SP1 releases for both Office client suites and SharePoint server products will be made available. All language versions of SP1 will release at the same time. Service Pack 1 will be offered as a manual download from the Download Center and from Microsoft Update.