A Confirmation ID is a unique identifier generated during the activation process of Microsoft Office 2016. It's used to verify that the product key is genuine and has not been used before.

"And Option B?"

Many third-party "web activators" or "CID tools" use leaked or volume license keys that violate Microsoft's terms of service. Licenses activated this way are frequently blocked without notice. The "Generator" Myth:

: Entering the CID into the Office Activation Wizard completes the process. Microsoft Learn Methods to Generate a Confirmation ID Official Microsoft Phone System

If you have a genuine product key and need to activate Office 2016 manually, follow these steps: Open an Office App : Launch Word or Excel. Navigate to Activation File > Account and select Activate Product (or "Change Product Key"). Choose Telephone Activation : In the Activation Wizard, select "I want to activate the software by telephone" Identify your Installation ID (IID)

If you have a legitimate license but cannot activate it over the internet, you must use the Telephone Activation