I am trying to migrate mail from one Zimbra server to another, with the same version of Zimbra using imapsync. No matter if I push from the primary or pull from the secondary, I cannot get imapsync to work, because it times out due to so many messages in the inbox. There is several GB of mail that I need to push. Is there any way to increase the timeout in Zimbra so this doesn't happen?
It works fine using accounts that don't have as much mail.