==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):     0.9.9
- Deployed with iRedMail Easy or the downloadable installer?   downloadable
- Linux/BSD distribution name and version:   Ubuntu 14.04 LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):   LDAP
- Web server (Apache or Nginx):   Nginx
- Manage mail accounts with iRedAdmin-Pro?   Yes  4.1
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
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I have added a new domain to my admin panel. I need to change some email addresses from the old domain to the new domain in addition to keeping their inbox and sent items in their new email.
EX) change user1@domain1.com  to be user1@domain2.com also to keep his old inbox and sent items shown in new user1@domain2.com