Ask the experts in the Windows Activation forum. Note: These keys and the product activation process are different from prior operating system versions. Please familiarize yourself before deploying Windows Server R2 in your organization. Please familiarize yourself before deploying Windows MultiPoint Server in your organization. For products that are available for download from the Microsoft Volume Licensing Service Center VLSC website, the setup key is provided on the download screen and may be accompanied with the following text: "Some products available for download require setup keys.
Please familiarize yourself before deploying Windows Web Server R2 in your organization. Note: This key and the product activation process are different from prior operating system versions. Only a MAK is available. Please familiarize yourself before deploying Windows Small Business Server in your organization.
Ask the experts in the Windows Small Business Server forum. Keys are printed on the media sleeve and cannot be found on the Web portals.
Learn about Windows Small Business Server product keys. Find helpful information on Windows Small Business Server licensing rights. Key is printed on the media sleeve; it cannot be found on the Web portals nor from the Microsoft Activation Center. Product activation and key information. Find products Note: Not all Volume Licensing products require a key. Browse categories:. English: All editions of Windows Server can be installed without activation for up to days.
Social Stuff:. Operating System. If you receive activation errors, check that you have the appropriate updates listed below this table. Depending on which operating system your KMS server is running and which operating systems you want to activate, you might need to install one or more of these updates:.
If you have more than 50 clients, we recommend that you have at least two KMS hosts in case one of your KMS hosts becomes unavailable. Most organizations can operate with as few as two KMS hosts for their entire infrastructure.
KMS can activate physical and virtual computers, but to qualify for KMS activation, a network must have a minimum number of computers called the activation threshold. KMS clients activate only after this threshold is met. To ensure that the activation threshold is met, a KMS host counts the number of computers that are requesting activation on the network.
KMS hosts count the most recent connections. When a client or server contacts the KMS host, the host adds the machine ID to its count and then returns the current count value in its response.
The client or server will activate if the count is high enough. Clients will activate if the count is 25 or higher. Servers and volume editions of Microsoft Office products will activate if the count is five or greater.
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