Your Installation ID is dynamic. It will change if you replace critical computer parts like your motherboard or primary hard drive. It also changes if you attempt to activate a different edition of Microsoft Office. What is a Microsoft Office Confirmation ID (CID)?
These are scams. The math behind the IID/CID is a cryptographic algorithm unique to Microsoft. Only Microsoft’s internal servers can generate a valid CID. Those websites are either: microsoft office installation id to confirmation id
This is a unique 63-digit (or 36-digit in some versions) code generated locally on your machine. It is a mathematical "snapshot" that combines your 25-character product key Your Installation ID is dynamic
In the Activation Wizard, select: Click Next . Step 2: Locate Your Installation ID microsoft office installation id to confirmation id