After you create a Microsoft Azure IoT Central application, you can use the **Administration** section of the Azure IoT Central user interface to administer it. To navigate to the **Administration** section, choose **Administration** on the left navigation menu.

- Extend a free trial

In the **Administration** section, there is a secondary navigation menu with links to the various administration tasks.

To access and use the **Administration** section, you must be in the **Administrator** role in the Azure IoT Central application. If you create an Azure IoT Central application, you are automatically assigned to the **Administrator** role for that application. The *Managing Users* section in this article explains more about how to assign the **Administrator** role to other users.

To change the name of your application, use the secondary navigation menu to navigate to the **Application Settings** page in the **Administration** section.

On the **Application Settings** page, enter a name of your choice in the **Application Name** field, and then choose **Save**.


On the **Application Settings** page, enter the URL of your choice in the **URL** field, and then choose **Save**. Your URL can be at most 200 characters in length. If the URL is not available, you see a validation error

You can create a copy of any application, minus any device instances, device data history, and user data. The copy will be a paid application that you'll be charged for. You cannot create a trial application by copying another application.

To copy an application, navigate to the **Application Settings** page and click the **Copy** button.


Clicking the **Copy** button will open a dialog in which you can select a name, URL, AAD directory, subscription and Azure region for the new application that will be created by copying your application. Select values for each of those fields and then click the **Copy** button to confirm that you want to proceed. You can learn more about what to enter for those values in the article about [how to create an application](howto-create-application.md).


Once the app copy operation succeeds, you will be able to navigate to the new application that was created by copying your application by clicking the link that appears on the **Application Settings** page.


Roles enable you to control who, within your organization, can perform various Azure IoT Central tasks. Azure IoT Central has three roles you can assign to users of your application. Roles are assigned by each application. The same user can have different roles in different applications. You can assign the same user can to multiple roles within an application.

The user creating an application is automatically assigned to the **Administrator** role. There must always be at least one user in the **Administrator** role.

Every user must have a user account before they can sign in and access an Azure IoT Central application. Microsoft Accounts (MSAs) and Azure Active Directory (AAD) accounts are supported in Azure IoT Central. Azure Active Directory groups are not currently supported in Azure IoT Central.

To learn more, see [Microsoft account help](https://support.microsoft.com/products/microsoft-account?category=manage-account) and [Quickstart: Add new users to Azure Active Directory](https://docs.microsoft.com/azure/active-directory/add-users-azure-active-directory).

1. To add a user account to an Azure IoT Central application, use the secondary navigation menu to navigate to the **Users** page in the **Administration** section.


1. On the **Users** page, choose **+ Add user** to add a user.


1. When you add a user to your Azure IoT Central application, choose a role for the user from the **Role** drop-down. Learn more about roles in the *Roles in Azure IoT Central* section of this article.


> To add users in bulk, enter the User IDs of all the users you'd like to add separated by semi-colons. Choose a role from the **Role** drop-down and choose **Save**.


Roles cannot be changed once assinged. To change the role assigned to a user, delete the user and add the user again with a different role.

To delete users, check one or more checkboxes on the **Users** page and then choose **Delete**.

To view your bill, navigate to the **Billing** page in the **Administration** section and choose **Billing**. The Azure billing page opens in a new tab and you can see the bill for each of your Azure IoT Central applications.

Once you've evaluated IoT Central, you can convert your trial to a paid application. To complete this self-service process, follow these steps:

1. Use the secondary navigation menu to navigate to the **Billing** page in the **Administration** section. If you haven't extended your trial, the page looks like the following:

2. Click **Convert to Paid**. If you haven't extended your trial, the pop-up looks like the following:

In the pop-up select the appropriate Azure Active Directory tenant and then the Azure Subscription that you want to use for your IoT Central application.

3. After you click **Convert**, your trial is converted to a paid application and you start getting billed.

By default, all free trials are available for 7 days. If you'd like to increase your trial to 30 days, you follow these steps:

1. Use the secondary navigation menu to navigate to the **Billing** page in the **Administration** section:

1. Click **Extend Trial**. In the pop-up select the appropriate Azure Active Directory tenant and then the Azure Subscription to use for your IoT Central application:

1. Then click **Extend**. Your trial is now valid for 30 days.

IoT Central Azure Resource Manager SDK packages are available for Node, Python, C#, Ruby, Java, and Go. These libraries support control plane operations for IoT Central, allowing you to create, list, update, or delete IoT Central applications. They also provide helpers for dealing with authentication and error handling that is specific to each language.

Examples of using the Azure Resource Manager SDKs can be found at [https://github.com/emgarten/iotcentral-arm-sdk-examples](https://github.com/emgarten/iotcentral-arm-sdk-examples).

To learn more take a look at these packages on GitHub.

Now that you have learned how to administer your Azure IoT Central application, here is the suggested next step: