When a system contacts a KMS for activation, it also passes its product key to the KMS.
Similarly, the KMS server will remove the record of an activated system if it has not heard from that system within 180 days this may drop the number of activated systems below the five or 25 threshold causing other systems to deactivate when they next contact the KMS because the minimum activation number has not been met. Activated clients, by default, attempt to contact the KMS every seven days if an activated client cannot contact the KMS within 180 days, it will deactivate. Having multiple KMSes in an environment could prevent systems from being properly activated.Įach client that attempts activation is assigned a unique value that is tracked by both the client and the KMS. Thus, it is important that you design your KMS activation scheme carefully. KMSs do not coordinate with each other, they are stand-alone systems. The KMS does not increment the counter over 50. Server 2008 systems will only activate if this value is five or over.
Vista clients will only activate if this value is 25 or over. The value of this counter is returned to each client when it tries to activate against a KMS. These volume licensed systems locate a KMS using DNS and SRV records as described in part one of this post.Įach KMS maintains an internal counter of how many clients it has activated. Volume licensed systems have the option to be activated by an in-house KMS. Unlike previous versions of Windows, all Vista and 2008 systems must be activated.
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KMSs respond to requests by Windows Vista and 2008 systems for activation (Windows 7 in the near future also). As I stated in part one ( Windows Activation: The Basics), don’t use a KMS key unless you know what you’re doing. I have been to customers large and small who had five, ten, and more KMSs running their environment. That’s right, any system, Vista included. A Key Management Server system is any system in your environment that you installed using a KMS key.
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