Merge pull request #531 from telerik/yoan/update-license-key-article

Updated License Key article accroding to template

Author: dessyordanova

_config.yml

@@ -30,6 +30,9 @@ navigation:
     distribution-and-licensing:
         title: Distribution and Licensing
         position: 6  
+    distribution-and-licensing/license-key:
+        title: License Key
+        position: 1
     integration:
         title: Integration
         position: 7

distribution-and-licensing/license-agreement.md

@@ -27,5 +27,5 @@ __UI for WinUI__: [https://www.telerik.com/purchase/license-agreement/winui](htt
 
 ## See Also
 
-* [Setting Up Document Processing Libraries License Key]({%slug license-key%})
+* [Setting Up Document Processing Libraries License Key]({%slug setting-up-license-key%})
 * [Redistributing Telerik Document Processing]({%slug installation-deploying-telerik-document-processing%})

distribution-and-licensing/license-key.md

@@ -0,0 +1,50 @@
+---
+title: Activation Errors and Warnings
+page_title: License Activation Errors and Warnings
+slug: activation-errors-and-warnings
+tags: activation, activate, errors, warnings, license, key, document, processing, libraries
+published: True
+position: 2
+---
+
+# License Activation Errors and Warnings
+Starting with the 2025 Q1 release, using a product without a license or with an invalid license causes specific license warnings and errors. This article defines what an invalid license is, explains what is causing it, and describes the related license warnings and errors.
+
+A missing, expired, or invalid license will result in:
+- A watermark appearing on application startup.
+- A modal dialog appearing on application startup. Clicking the **OK** button of the dialog closes the dialog and removes the banner until the next application startup.
+- A warning message can appear in the build log.
+
+### Invalid License
+An invalid license can be caused by any of the following:
+
+- Using an expired subscription license-subscription licenses expire at the end of the subscription term.
+- Using a perpetual license for product versions released outside the validity period of your license.
+- Using an expired trial license.
+- A missing license for the product.
+- Not installing a license key in your application.
+- Not updating the license key after renewing your product license.
+
+### License Warnings and Errors
+When using the product in a project with an expired or missing license, the _Telerik.Licensing_ build task will indicate the following errors or conditions:
+
+|**Condition**|**Message Code**|**Solution**|
+|----|----|----|
+|No license key is detected|TKL002|[Install a license key]({%slug setting-up-license-key%}) to activate the UI components and remove the error message.|
+|Invalid license key|TKL003|[Download a new license key]({%slug setting-up-license-key%}#downloading-the-license-key) and install it to activate the UI components and remove the error message.|
+|Your subscription license has expired.|TKL103; TKL104|Renew your subscription and [download a new license key]({%slug setting-up-license-key%}).|
+|Your perpetual license is invalid.|TKL102|You are using a product version released outside the validity period of your perpetual license. To remove the error message, do either of the following: <br> - Renew your subscription and [download a new license key]({%slug setting-up-license-key%}#downloading-the-license-key). <br> - Downgrade to a product version included in your perpetual license as indicated in the message.|
+|Your trial license has expired.|TKL105|Purchase a commercial license to continue using the product.|
+|Your license is not valid for the detected product(s).|TKL101|Review the purchase options for the listed products. Alternatively, remove the references to the listed packages from _package.json._|
+
+## See Also
+
+* [Setting Up Your License Key]({%slug setting-up-license-key%})
+* [Adding the License Key to CI Services]({%slug adding-license-key-ci-cd-services%})
+* [License Key FAQ]({%slug frequently-asked-questions%})
+* [License Agreement]({%slug license-agreement%})
+* [Redistributing Telerik Document Processing]({%slug installation-deploying-telerik-document-processing%})
+* [Unable to find package Telerik.Licensing]({%slug dpl-package-update-failure-license%})
+* [Handling License Key File Name and Environment Variable Name Changes in the 2025 Q1 Release]({%slug handling-license-file-name-changes%})
+* [Telerik.Licensing NuGet package is not available on the Telerik NuGet feed]({%slug dpl-telerik-licensing-nuget-feed%})
+