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[Samba] Samba 3 domain to AD domain migration.

Good Morning Samba list,

I know I don't post here often (or.. maybe ever) but i've been watching
along for years.

We're in a situation where we have an aging samba 3 domain.  It acts
like an old NT domain, samba folks should understand that.  Its just
where the capabilities of samba3 landed us. 

For many reasons we want to get off of this domain, and on to something
more modern, and we've decided that a true windows AD is the place to
go.  We have a lot of the migration worked out, but we're down to one
last caveat.  Passwords.  We don't want to force a password reset for
all of our users.  At least not within the timeframe of this migration. 
So we're trying to find migration options that will take the existing
samba passwords and migrate them over to AD.  The passwords are
currently stored in NT4 hashes (one of the reasons we want to get off of
this domain). 

So, all that background to ask my question.  Samba 3 to Samba4 migration
MIGHT be an option. 

I'm an accomplished nix admin, so i'm not afraid to try that upgrade, we
didnt want to take the time to do that step if we could avoid it. 
However, since we're stuck on these passwords, i'm wondering if it's
back on the table.  The problem is, the document doesn't seem to
directly address passwords.  It doesn't say that it does convert the
passwords, it also doesn't say that it doesn't.  At least not that i've
found in the doc. 

My goal would be to use the samba4 migration as a go-between from
smb3/nt to Windows AD.  Would migrating to samba4 migrate passwords, AND
set me up such that I can then use a domain trust, or a windows DC
joined to the samba4 domain, to replicate passwords over to Windows AD?

Sorry for being long-winded, let me know if you need more info.  Thanks!

Nathan Lager, RHCSA, RHCE, RHCVA (#110-011-426) 
Sr. System Administrator
1 South 3rd St.
4th Floor
Easton, PA 18042

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