Thank you for this answer, I was trying to renew a commercial certificate while the server was down and I was receiving the errors that the original poster mentioned, but everything else seemed to be ok.
Originally Posted by Ramadan Mansoura
I started Zimbra and ran the deploy command again and everything worked as expected with no errors.
/opt/zimbra/bin/zmcertmgr deploycrt comm /tmp/2012ssl/commercial.crt /tmp/2012ssl/commercial_ca.crt
Release 7.2.4_GA_2900.UBUNTU10_64 UBUNTU10_64 FOSS edition.