How to retrieve your Office 2013 Product Key when it is lost
This was the source of the first great frustration. You had to download gigabytes of data from Microsoft’s servers using that key. If your internet was slow, you were out of luck. The key was your proof of purchase, but it was fragile. Once you used it, it was "consumed."
Many users thought they owned Office because it was on the computer. They saw the key in the system and assumed it was theirs. But it was an "Office OA" (Oriental/Original Equipment) key, specifically designed to lock Office to that specific motherboard for a region-specific trial.
The product key for Microsoft Office 2013 can be found in various places, depending on how you obtained the software:
Office 2013 introduced deeper integration with SkyDrive (now known as OneDrive), allowing users to save, access, and share their documents from anywhere, on any device. This seamless cloud connectivity was a significant step towards making work more flexible and accessible.
It was late 2012, and the technology world was holding its breath. Microsoft was preparing to launch Windows 8, a radical redesign of the world’s most popular operating system. Alongside it came Office 2013, code-named "Office 15."