You receive an error message when you try to activate a Windows Vista-based computer in a KMS pool: "The returned count from your Key Management Service is insufficient"

You try to activate a new Windows Vista-based client computer. If the client computer is hosted by a computer that is running the Key Management Service (KMS), the client computer may not be activated successfully. Therefore, the computer is not added to the KMS pool. Instead, you receive the following error message:

This problem may occur when there are fewer than 25 client computers in the KMS pool.

To resolve this problem, you must add more client computers to the KMS pool.

To determine how many computers are in the KMS pool on the KMS host, type the following command at a command prompt, and then press ENTER:

For more information about the error codes that you may receive when you use KMS to activate on one or more Windows Vista-based computers, click the following article number to view the article in the Microsoft Knowledge Base: