# Create an Exchange Online App Using the Custom Configuration

Create an Exchange Online app using the custom configuration option.

## Procedure

1. From the Command Center navigation pane, go to Explore > Service catalog.

2. On the Microsoft 365 tile, click Configure, and then select Exchange.

3. Start the O365 trial or continue to the configuration tool:

   - If you have never configured an Microsoft 365 app before, the Office 365 configuration tool appears.

     1. Click Start Trial.

        The Configure Office 365 message box appears. You must wait while the Commvault Cloud software activates the Commvault Cloud subscription, creates Office 365 plans, and creates a backup plan for Microsoft 365 backups.

     2. When this process is complete, click Close.

   - If you have configured an Microsoft 365 app before, the Office 365 Trial message appears.

4. Click Continue.

   The Create Exchange Online App tool appears.

5. On the Region tab, from the Storage region list, select a region, and then click Next.

   The Application tab appears.

6. In the Name box, enter a name for the app.

7. Select Custom configuration (Advanced).

   If you did not manually register the Azure app with Azure AD, you can use the custom configuration toolkit, which automates the registration process.

8. In the Azure app area,

   - To add an existing credential, select the credential from the list.

   - To add a new credential, click Create new .

     The Add credential tool appears. The Account type, Vendor type, Authentication Type, Credential Vault, and Environment fields will be auto-populated.

     Provide the below details and then click Save.

     1. Credential name: Provide a unique name for the credential.

        For example: CompanyName_Exchange_Online_APP1.

     2. Application ID: Enter the Azure application ID.

     3. Tenant ID: Enter the Azure tenant ID.

     4. Application secret: Enter the Azure application secret.

     5. Show endpoints: Click the toggle to edit the Authentication endpoint, Storage endpoint, and Resource Management endpoint.

     6. Description: Enter the description for the credentials.

        For instructions about locating this information, see Create a Microsoft Entra application and service principal that can access resources in the Microsoft documentation.

        Important

        A Conditional Access Policy must be enabled for the selected or newly created Azure app. Without it, you won’t be able to add or create an Azure app. For more information, see Create a Conditional Access Policy for Exchange Online Azure Apps.

9. Verify the requirements, and then select the The Azure app is authorized from the Azure portal with all the required permissions check box.

10. Click Create.

    The Summary tab appears.

11. Click Close.

Note

For better job throughput, add at least five Azure apps to the Exchange Online app. For more information, see Add Azure Apps.

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