GUIDE 01 4 min
What Is a Phone Activation Key? Complete Guide
Learn what a phone activation key is, how Microsoft phone activation works, and how Installation ID and Confirmation ID are used to activate software.
Read guideWEBDIGIKEY GUIDES
Microsoft activation, explained clearly.
Practical, customer-focused guides for choosing the right license and activating Windows, Office, Project, and Visio.
START HERE · COMPLETE GUIDE
Complete Microsoft Product Activation Guide
Complete Microsoft activation guide covering product keys, Retail vs OEM, Online vs Phone activation, Installation IDs, Confirmation IDs and common errors.
Read the pillar guideACTIVATION LIBRARY
Explore every guide
10 expert articles
GUIDE 02 4 min
How to Activate Microsoft Office by Phone
Learn how Microsoft Office phone activation works using your product key, Installation ID and Confirmation ID with this step-by-step guide.
Read guideGUIDE 03 4 min
Windows Installation ID & Confirmation ID Activation Guide
Learn how Windows activation works using an Installation ID and Confirmation ID, including the difference between IID and CID.
Read guideGUIDE 04 4 min
Online Activation vs Phone Activation
Compare Online and Phone activation for Microsoft products and learn which activation method is right for you.
Read guideGUIDE 05 4 min
How to Find Your Installation ID
Learn what a Windows Installation ID is, where to find it and how it is used during offline Microsoft activation.
Read guideGUIDE 06 4 min
What Is a Confirmation ID (CID)?
Learn what a Microsoft Confirmation ID is, how CID activation works and how it differs from your Installation ID and product key.
Read guideGUIDE 07 4 min
Office Phone Activation Not Working? Common Fixes
Microsoft Office phone activation not working? Learn how to troubleshoot product key, Installation ID, Confirmation ID and edition errors.
Read guideGUIDE 08 4 min
Retail vs OEM Windows Keys
Learn the difference between Retail and OEM Windows licenses, including activation, device association and transfer considerations.
Read guideGUIDE 09 4 min
How to Activate Office 2021
Learn how to activate Microsoft Office 2021 with a product key using Online or Phone activation and troubleshoot common problems.
Read guide