Here are the steps for conviences sake:
If it becomes necessary to delete data prior to meeting the Retention Period time from a Compliance device then the following procedures can be performed.
NOTE: This can only be performed if the Retention Period has been set to zero or has expired on the clip stored on Centera. If the item was stored with a 3 year retention, and using one of the retention options that writes non-zero retention to the clip it cannot be deleted until the 3 years have passed.
1. Open the Vault Administration Console (VAC), right-click on the Site_name and choose Properties.
2. Click on the Storage Expiry and ensure Never is selected under Process Vault Stores. If the value was changed to Never then restart the Enterprise Vault Storage Service for the change to take affect.
3. Go to Site_name > Policies > Retention Categories in the VAC.
4. Right-click on the name of the Retention Category that needs to be modified and choose Properties.
5. On the General tab modify the Retention period to a time that is below the current level to allow the delete to occur (for instance 1 day).
6. Ensure that Prevent deletion of archived items in the category is not checked and click OK.
7. Perform the delete operation on the items or the archive.
NOTE: Storage Expiry should NEVER be run in Normal mode when performing this procedure as it will expire all items that meet the reduced Retention Period.
8. Once the delete is successful modify the Retention Period back to the original setting to allow Storage Expiry to run normally.