According to MacTech, Microsoft recently changed the original license agreement for Office for Mac 2011 to match Office 2013 for Windows, whose license prevented the transfer of the software from one computer to another. Microsoft reversed course on the Office 2013 licensing policies, once again allowing the software to be moved between computers (but no more than once every 90 days). Although Microsoft said nothing about the Mac version in its Windows Office announcement, MacTech learned that the reversal also applies to the Mac version. In short, we’re back where we’d expect to be, but it’s distressing that Microsoft would even contemplate such an unfriendly license, much less implement it. follow link
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Microsoft Reverses Office Licensing Change