new wrote:

when we set a reminder from sent items , it does not ring but when
the same is applied from inbox the reminder works perfectly

can u tell me is there a setting required to turn it on or can u
assist me how to set it

I don't believe Sent Items allows reminders without a third-party add-in
like http://www.slovaktech.com/extendedreminders.htm
--
Brian Tillman [MVP-Outlook]