Many Microsoft Office users have switched to the subscription-based Office 365 from the traditional Office products. However, a small number of PC users are still buying and using legacy Microsoft Office products such as Office 2016. Office 2013 or the latest Office 2016 can be activated using a valid product key. If you have recently bought an Office 2016 copy or have a key of Office 2013 and want to check if the product key is valid without installing the Office and activating it, here are two easy ways. According to this support page of Microsoft Office, Microsoft’s virtual support agent can now check if an Office 2013 or Office 2016 product key is valid. If the entered Office product key is valid, it offers download links to your version of Office. In addition to that, download Office using product key service can also be used to check if your Office product key is valid. In this guide, we will discuss the two easy ways out there to check if an Office product key is valid. Method 1 of 2 Check if Office key is valid using virtual support agent Here is how to check if your Office 2013 or Office 2016 product key is valid using Microsoft’s virtual support agent. Step 1: Visit this page of Microsoft to open the virtual support agent page. Click the Yes link. Step 2: Enter your 25-character Office 2013 or Office 2016 product key (XXXXX-XXXXX-XXXXX-XXXXX-XXXXX in this format) and then press Enter key. Step 3: If the product key is valid, you will get a link to download your version of Office. If the key is invalid, you will get “Sorry, but we cannot find that product key. Make sure you have the correct product key and try entering it again” message. If the virtual support agent says that the 25-character product key is not valid, please make sure that you have typed all characters correctly and entered using the above format. If you are still getting “Sorry, but we cannot find that product key” message, contact Microsoft support first and then also contact the vendor from whom you bought your copy of Microsoft Office. Method 2 of 2 Check if Office key is valid using Office download page You probably know that you can download your Office 2013 or later from Microsoft by entering the product key. If you don’t know, you will be glad to know that you can download Office 2013 or later version of Office from Microsoft by entering a valid Office key. Using the above provision, you can check if your Office product key is valid. Here is how to do just that. Step 1: Visit this page of Office. Sign-in with your Microsoft account. Step 3: Type in your 25-character Office product key. If the key is valid, the page allows you to choose your version and edition of Office and offers download links for the setup file. Hope you find this guide useful!