It can be done via the command line. Open up a Command Prompt (Press the Windows Button and type CMD or navigate to All Programs -> Accessories -> Command Prompt). Then you just need to use the command below that matches your OS. For 32 bit Windows: cscript "C:\Program Files\Microsoft Office\Office15\OSPP.VBS" /inpkey:yourkeygoeshere For 64 bit Windows (assuming you are using 32 bit Office): cscript "C:\Program Files (x86)\Microsoft Office\Office15\OSPP.VBS" /inpkey:yourkeygoeshere Obviously, you need to replace yourkeygoeshere with your product key. Note: If you are installing a 64 bit version of Office on 64 bit Windows, the command for 32 bit Windows should be used (or just delete the (x86) part since it won't be installing to the C:\Program Files (x86)\ directory).
DynDNS have removed their free account service and now require customers to pay a minimum of $30/yr for a basic account. If you've already registered an account with DynDNS don't worry, existing customers on the free service won't need to start paying. This will only affect new customers that would like to register an account to manage remote equipment without the need for a static IP. If you'd like to use a Dynamic DNS client, but don't want to pay for service there are alternative options. The following Dynamic DNS clients are free of charge and are cross compatible with Cradlepoint and Peplink products: