License upgrades allow you to extend an existing license with additional devices, features or support (after a purchase has been made).
For prior license upgrades, make sure that you have:
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Access to the management interface
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A new activation key
Performing the License Upgrade
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Log in as an administrator to the management interface and open the license information.
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It is better to install all management cluster nodes before license upgrade otherwise you will need to reactivate license again.
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Click CHANGE EXISTING LICENSE.
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Select Upgrade existing license.
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Enter the new activation key.
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Select one of the activation methods (Online activation or Offline activation), and follow the next steps to finish the license upgrade.