I did end up solving this. Looking at the failure log, I noticed that Z Push for Kopano was causing an error. Since that can be removed without impact to any of the emails etc, I uninstalled it then ran the update. It finally worked… Once upgraded I reinstalled Z Push. I did wind up with another issue where Kopano would not send or receive emails although I did not change any of my configuration… I watched the mail log with “tail -f /var/log/mail.log” It turns out that Postfix was crashing and it was this issue "The Variable mail/postfix/ldap/timeout has the value mail_postfix_ldap_timeout" which was solved by going to the UCR, searching for mail_postfix and editing the text variable to 15. This is the post that helped me solve it. Problem: Postfix not starting after upgrade from UCS4 to UCS 5