# Creating an Exchange DAG Client

To use the Exchange Database application in a Database Availability Group (DAG) environment, you must configure a DAG client and select a server.

The DAG client (also called pseudoclient and master client) stores the configuration information for all the member servers, and coordinates backup operations and restore operations for different servers.

## Before You Begin

You must install the Exchange package on each member server using the fully qualified domain name.

## Procedure

1. From the Command Center navigation pane, go to Protect > Exchange.

   The Exchange page appears.

2. At the top-right of the page, click Add exchange app.

   The Configure An Exchange App page appears.

3. Select Exchange database (DAG), and then click Next.

   The Add Exchange Database tool appears.

4. On the General tab, in the Server name box, enter a name for the DAG client, and then click Next.

   The Backup Plan tab appears.

5. From the Backup Plan list, select a backup plan, and then click Next.

   The Infrastructure tab appears.

6. From the AD domain name list, select an Active Directory domain name server.

   Only configured Active Directory domain name servers appear in this list, but you can add a domain name server, which will then appear in this list.

7. In the User name and Password boxes, enter the user name and the password for the domain.

8. If DAG is set up in a restricted environment, install the application on a proxy computer that has access to both the CommServe server and the Active Directory. Select Access node for DAG discovery, and then from the Access node list, select the appropriate proxy computer.

9. From the Exchange version list, select the Exchange version for the database, and then click Discover.

10. From the DAG servers list, select a DAG server that has an available member server.

11. From the Member servers list, select a member server, and then click OK. You can add more member servers to a DAG server.

    The Summary tab appears.

12. Click Save.

## Result

The new Exchange DAG client is created. The client contains a default subclient.

## What to Do Next

Assign content to the default subclient. For instructions, see Assigning Content to the Default Subclient.

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