The software was prompting him to activate, and he couldn't remember the product key. John had purchased Publisher 2010 a few years ago, but he had misplaced the email with the product key and couldn't find it anywhere.
If you purchased a digital copy, search your inbox for "Microsoft Store" or "Office Product Key". publisher 2010 product key
That said, I can provide a that explains: The software was prompting him to activate, and
Using an unlicensed product key violates the Microsoft Software License Terms and may constitute copyright infringement under the Digital Millennium Copyright Act (DMCA) or local laws. Penalties can include fines (up to $150,000 per willful violation in the US) and, in rare cases, civil lawsuits. That said, I can provide a that explains:
Here is the paper.
Since 2020, Microsoft has deactivated the activation servers for Office 2010 in many regions or restricted support. Any website offering a “working Publisher 2010 product key” typically provides keys that are: