Dear Manoj, your mail before 26/05 are available in your office's system please check there. online Zimbra will show only online mails. that is happening due to POP Setting. Please call if have any question.
E-mail not show in zimbra mail before 26/05/20 and comunication made through zimbra mail not showing in baba mail. kindly do the needful to resolve the issue, so that all E-mail can see any where.