Use these steps to access the app settings:

Log in to the PaaS portal with your credentials.
Select the project to manage.
Click on the App Settings tab on the project page.

Follow these steps to add or update an app setting or connection string:

Click Add Secret to add a setting, or click the Edit icon next to the existing setting. You can click the Delete icon to delete a setting.
Provide the following information:
- Name – Enter a unique name for the setting. Secret names must be between 1 and 127 characters long, can only contain alphanumeric characters, and cannot start with Episerver or Optimizely.
- Environment – Choose the environment for the setting. You can select from Integration, Preproduction, Production, or ADE.
- Type – Select AppSetting or a type of connection string (such as SQLAzure) for the type of setting you want to add or update. You can use Custom for connection strings that do not match the predefined options, such as a connection string to Azure blob storage.
- Value – Enter the value for the setting or connection string.
Click Save to store the setting.

The next deployment activates the added or updated setting to the selected environment. The setting is also available in the deployment slot during deployment.

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Note
Only deployments using Deployment API and using DXP Management Portal UI are supported.
App settings and connection strings values are not added/updated if you deploy with WebDeploy using *.publishprofile file, FTP upload, or service principal.

You can access secret values from web app code using ConfigurationManager, the same way as other values of web.config configurations.

Before deploying to Production, you should test your changes in the Integration and Preproduction environments to identify and resolve any potential issues before they impact your site.

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Note
If you have previously added a specific setting through support and then add one with the same name through PaaS portal, the next deployment overwrites the setting with the new value.