2. In the "Mail" section click on "User-Level Filtering" Icon.
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3. Under "Filters by Users" You can see all of your existing email accounts, Click on "Manage Filters" next to the appropriate one.
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4. Under "Current Filters" You can see all of your existing filters, Click on "Edit" next to the appropriate one.
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5. Make the desired changes to the filter.
6. Click on the "Save" Button.