When will Microsoft release the Semi-annual Channel upgrade for Windows Server? The company said the updates will ship in the spring and fall, but also dropped clues that March and September would be the designated months by using examples such as 1709 and 1803 as labels. (In Microsoft's lexicon, releases for, among other products, Windows 10, are numbered as yymm. Those examples would correlate to September 2017 and March 2018, respectively.)
It's unclear whether Microsoft will issue upgrades on the same days in September and March that are the most likely release points for Windows 10 and Office 365 ProPlus: Each month's Patch Tuesday. If Windows Server follows suit, the first upgrade would appear Sept. 12, the next on March 13, 2018.
Figure 2 shows the first two releases and their support lifecycle lengths, and illustrates how support for the two overlaps for a 12-month stretch.
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