You can manually discover a new database on the SQL Server and add it to a specific subclient.
Best Practice: Add only a few small databases to each subclient, and add larger databases to separate subclients. On a restart condition, the system will back up all the databases in the subclient from the beginning. For this reason, you would not want a large database that has completed its backup successfully to be backed up again only because a smaller one has caused a restart to occur.
Procedure
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From the CommCell Browser, click Client Computers > client > SQL Server > instance.
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Right-click the default subclient, and then click Properties.
The Subclient Properties dialog box is displayed.
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On the Content tab, click Configure.
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In the Database Configuration dialog box, click Discover.
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To assign a single database to a subclient, enter the database details, and click OK.
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To assign two or more databases to a subclient:
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In the Database Title column, press the CTRL key, and then click to select two or more databases.
Verify that you have at least one user-created database selected.
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In the Change all selected databases to list, select a subclient, and click OK.
 
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Click OK to close the Subclient Properties dialog box.