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If you have ever tried to activate a volume-licensed version of Microsoft Office (such as Office LTSC Professional Plus 2021, Office 2019, or Office 2016) over the phone or via the web, you have encountered two critical, intimidating codes: the Installation ID (IID) and the Confirmation ID (CID).
Select your country in the Office Activation Wizard to see the correct toll-free number.
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In this guide, we will break down exactly what these IDs are, how to generate the IID, and the multiple methods you can use to turn that IID into a working CID.
Command Line: Open Command Prompt as Administrator and run cscript slmgr.vbs /dti to display your Installation ID. Step 2: Convert to Confirmation ID There are two primary official ways to get your CID: Official Phone Activation: Mastering the Switch: How to Convert Microsoft Office
, which you must type into blocks A through H in the Activation Wizard. Command Line (Technical Method): To find your IID via Command Prompt, run: cscript ospp.vbs /dinstid (located in the Office installation folder, e.g., C:\Program Files\Microsoft Office\Office16
Converting a Microsoft Office Installation ID (IID) to a Confirmation ID (CID) is the process used to activate your software when the standard online activation fails. This is typically done through Microsoft's Phone Activation system. How to Get Your Confirmation ID [ ] Install Office with a valid MAK or volume key
Unlike your Product Key, which remains constant, the Installation ID changes based on the hardware of your computer. It acts as a digital fingerprint that tells Microsoft's activation servers exactly which computer is trying to use the software.
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