You can change the deduplication properties for the storage policy copy.
Alternatively, you can modify deduplication properties on a storage policy copy by using the Update_DDB_Settings.xml configuration file, which contains parameters that define the storage policy copy. For more information, see Modifying Deduplication Options using XML.
Procedure
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From the CommCell Browser, expand Policies > Storage Policies > storage_policy.
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Right-click the appropriate storage policy copy and then click Properties.
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In the Copy Properties dialog box, click the Deduplication tab and choose how you want to modify the deduplication database (DDB) settings.
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Click OK.