I am moving clients from a CentOS 5 server to a CentOS 6 one. I plan to create DA user backups on the old server and restore from backup on the new server. Are there any issues that I should be aware of?
The Admin Backup/Transfer option should be all you need to move sites between servers, but the servers must first be properly configured. Note that recent tests show that if you use /etc/virtual/limit_USER files, you may need to move them separately.