Hi,
My company plans to install a LAN for working with a big customer through a dedicated WAN connection.
The current status is to install windows 2003 server for PDC, Mail Server, Proxy Server, DHCP Server and probably DNS Server.
All local desktops (~40 PC) will certainly use Windows XP (maybe also with a dual boot with Linux or Cygwin and Exceed for remote unix connections with the customer).

The question is:
Does RHEL 4 provides by default a clean windows connectivity setup (acting as a PDC, the rest is known to be available)?
And if yes, is the support included (for these tasks). What about training?
PDC will be certainly done through two redundant machines for high availability.

Any suggestions and experiences welcome.

Thank you

As the RedHat Enterprise Linux is a commercial product, I think the people working there can best answer your questions; if you're planning to put some money into this business, it is a good idea (in addition to asking other places like here) to contact RedHat directly, and ask those same questions from them. Certainly RedHat users (and Linux users generally) can answer to or guess some things, but because RedHat is selling RHEL, I believe they should know best.

I am pretty confident that with enough time (and money) you are able to do whatever you like, but if it's business and not a hobby, go and ask them directly - it saves both time and money.

Yes I know I can call them but I wanted to have unbiased opinions from admins or power users community before getting a pseudo-marketing talk.
I'm not looking for technical details, only ideas and conclusions from people who have done this.
Anyway, thanks for answering.

Yes, Red Hat provides all the needed applications and setup help in the Guides which are freely available, try reviewing or reading them first before calling RHS;

http://www.redhat.com/docs/manuals/

From the sounds of it you will want to review the Red Hat Enterprise Linux AS and the Red Hat Cluster Suite guides to start with.

Thank you.
Unfortunatly, Windows infrastructure has been chosen (~125000 euros).

and to think you could have done it much cheaper by using Centos (free re-badged ver of RHEL).

No clue. Actually I lied a bit because it was for a friend (I have had mitigated experience with RH, I would go with debian..), he's into RH/Fedora since 20 years but never goes on forums. He just wanted to have some ideas (all the network map and availability and cost study was ready)
Anyway, it's his administrator who has put a veto on Windows , as HE will be the person that will be trained and he's so scared of linux... he needs his "next" button when configuring stuffs... usual story :-) Its a pity for him.. his mind is LOCKED.
I didn't know CentOS was a RHEL, I had only heard about its stability and security.
I don't really see why the price would ve been different?
And they needed on-site maintenance, hence the choice for RHEL.