Steps FOSS 4.5.9 32bit to 5.0.8 64bit on Debian

[sd3919]

I currently use ZCS_4.5.9_Debian 3.1 FOSS on a Debian 4.0_32bit.
Now I need to move on a new server running Debian 4.0_64bit,
and I'd like to upgrade to the last ZCS_5.0.8.

What is best way to upgrade and to import all data ?
May I install ZCS_5.0.8_UBUNTU_64bit ?

Thanks.

[phoenix]

There is no 64 bit build for Debian, if you specifically want a 64bit version then install one of the 64 bit builds on a supported operating system.

[sd3919]

I installed ZCS_5.0.8_UBUNTU_64bit on my new server running Debian 4.0_64bit.
I read the documentation about User Migration. But how can I migrate accounts, aliases, lists, and all other configurations? Is if sufficient to dump and restore ldap database ?
Thanks.