Remove delete Key from zimbra webmail

[Sree]

I would like to remove delete key from my zimbra so that i can prevent users from deleting mails their mail box.

[phoenix]

I would like to remove delete key from my zimbra so that i can prevent users from deleting mails their mail box.

That's not the answer to your problem, you'll never stop users from deleting mail. The correct answer would be to use a backup of your ZCS server and some form of archiving so you keep all mail sent and received,