If you want the leads to be removed from the list of lead then they can be archived. You should have the correct permission for this:
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Please Note: Clients can not be archived in bulk.
Follow the following steps to archive the enquiries.
Step 1: Select Enquiries from the dashboard.
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Step 2: Select the Enquiry from the list which you want to archive simply by clicking the check box.
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Step 3: Select the Bulk Archive tab on the top left corner.
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Step 4: Select the Accept tab.
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Step 5: The archived enquiries will now be listed in the Archive list.
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