Leads Duplication Issue

Hi,
I just installed SuiteCRM.
I have issue when we upload the Leads with same EMAIL address, it is not warning.
It is possible that I can make it strict that when we add the Leads , only Unique email address is entered?
Please help.

Hi,

If you are uploading the Leads with suitecrm import feature. You need to enable this duplicate email check. For this to achieve please
DRAG email_address field from right side to left side on duplicate check page in import wizard. You need to do it each time whenever you do the Leads import.

Thanks

Hi Sohaib,
thank for helping me.
I finally find out when I import that.