Apply a New License
Required Tenable Security Center User Role: Administrator
To apply a license for an additional Tenable product, add the license activation code. To update a license for an existing Tenable product, see Update an Existing License.
For general information about licensing, see License Requirements. For information about adding a license during quick setup, see Quick Setup.
To download Tenable Security Center, see the Tenable Security Center downloads page.
To apply a new Tenable Nessus or Tenable Network Monitor license:
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                                                        Log in to Tenable Security Center via the user interface. 
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                                                        In the left navigation, click System > Configuration. The Configuration page appears. 
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                                                        Click the License tile. The License Configuration page appears. 
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                                                        Click the product box for the license you want to apply. 
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                                                        In the box, type the activation code for the product. 
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                                                        Click Register. Tenable Security Center updates the page to reflect the activation code status: - 
                                                                Valid Code: A green box with a check mark. 
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                                                                Invalid Code: A red box with an X. 
 If the code is valid, Tenable Security Center initiates a plugin download. 
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