Using the Live Transfer tool, accounts with ACLs set will cause the sites to error with a 403 denied message.
When an account is migrated using the Live Transfer tool with ACLs in the .htaccess to allow and deny Ip addresses, this will cause a 403 when accessing the domain on the original server.
Ensure mod_remoteip is installed for apache and add the following to
/etc/apache2/conf.d/370_mod_remoteip.conf on server2:
RemoteIPHeader X-Forwarded-For RemoteIPTrustedProxy 10.2.33.30
Then, restart the Apache service.