All thanks to dijichi2, with his build of zcs-4.5.4_GA_754 for Solaris it's now possible to have network edition 4.5.7 running on Solaris just in few minutes.
Originally Posted by dijichi2
Everything you need - just download, for example, zcs-NETWORK-4.5.7_GA_1319.RHEL5_64.tgz for Redhat EL5, unpack it, and then overwrite the following directories and files of the /opt/zimbra of the dijichi2's build by the ones from unpacked rhel5 rpms.
I have Centos5 so instead of unpacking I've just installed temporarily network edition there. But I think it may be done in Solaris by cpio of these rpm files.
About overwriting: I've completely erased all these 13 directories and them copied them from network edition installation tree.
I have tested synchronizing Mac's Calendar and Address Book, I had problems with instalation of Outlook Connector, but I saw the same problems reported here, so it's not a Solaris' specific.