When activating a license it is locked to a MachineID of the PC it is installed on (Or the server in the case of an SBS license), this is based around on the MAC address of the PC.
If the PC has multiple network adaptors or if is using a virtual server (In the case of SBS licenses) then the MAC address can change causing the license to become invalid.
There are two solutions for these situations:
- Use a USB license dongle which that will act as the MachineID (May it may not work on virtual servers)
- Use an alternate method of generating the MachineID that is not based on the MAC address
Click here to download a utility that will generate a MachineID based around the HDD ID of the windows installation, this should not change unless you reinstall Windows.
When you run this utility it will give you a MachineID starting with 4-xxxxx.
Visit our License Activation page and enter your license details along with this new MachineID.
...
This should stop any issues related to the MAC address of the PC from changing.