Take the 2-minute tour ×  I have worked out that a company I am
working for is using the same product key on all its computers.
They are all Windows 7 Enterprise PCs. Is this legal for them to
be doing this?  share|improve this question  2 Answers 2  up
vote 16 down vote accepted  Volume Licensing  Windows 7
Enterprise is only available through the Volume Licensing (VL)
channel. Unlike other editions which are available through OEM
or retail channels, a single key can be used for multiple
activations.  With Volume Licensing for products such as Windows
8.1, Windows Server 2012 R2, Windows Server 2012 R2 for Embedded
Systems, Windows 7, Windows Server 2008 R2, Windows Vista,
Windows Server 2008, Microsoft Office 2010, and Office 2013, you
must use Volume Activation (VA). To activate these products with
VA, you can use either a Multiple Activation Key (MAK) or Key
Management Service (KMS).  Source: Microsoft Volume Licensing -
Product Activation   A MAK is used for one-time activation with
Microsoft's hosted ac