You need to purchase an access key. One key = one CID. If a CID is not issued (e.g. due to a blocked activation key or other reason), the access key is not burned — you can reuse it to retry the IID.

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Phone activation is the process of obtaining a special CID code from Microsoft by calling support to activate Windows or Office products.

Average response time is ~5 seconds.

1. Open a Microsoft Office app (e.g., Word or Excel).
2. Enter the product key in the "Enter a product key" field.
3. Select the "Activate this software by phone" option.
4. An installation ID (series of digits) will appear.
5. Enter the received numbers in the "Enter the installation code" field.
6. Enter your access key.
7. Click the "Get CID" button.
8. Within a few seconds you will receive the response code on the website and by email.
9. Enter the received CID code in the app and click "Next". Done! Your product is activated.

1. Open the Start menu and select "Settings" (Windows 10-11) or "Control Panel" (Windows 7-8).
2. Go to "Update & Security" → "Activation" (Windows 10-11) or "System and Security" → "System" → "Activate Windows" (Windows 7-8).
3. Select the "Activate Windows by phone" option.
4. An installation ID (series of digits) will appear.
5. Enter the digits on the OS-Market website in the "Enter installation ID" field.
6. Click the "Get CID" button.
7. Within a few seconds you will receive the response code on the website and by email.
8. Enter the received CID code into the Windows activation window and click "Activate". Done! Your Windows is activated.

1. Blocked IID - Your Microsoft activation key is blocked.
2. Key Blocked - Your Microsoft activation key is blocked.
3. IID Request already exists - Your Microsoft activation key is blocked (this is a repeated request for a blocked key, check your email for the message).