W2K3 32 bit to W2K8 64 bit

There is no direct upgrade from 2003 32bit to 2008 64bit - you will have to do a fresh install.

You may be able to backup DHCP from 2003 and restore it to 2008 - but I would advise you to test it first.

Yes, this is possible and is almost the same that in win 2003. I have done this with a customer without any problem.

That's only possible if your hardware supports 64 bit or both should be same hardware architecture.

You cannot in place upgade but you can migrate windows 2003 32bit to windows 2008 64 bit, please note when you want to ADprep your 2003 server you need to run the 32bit version of adprep.

Migrating DHCP here http://technet.microsoft.com/en-us/library/dd379535(WS.10).aspx is a document about this.

From what I can tell from ronnypots chart in the link says it should be possible, but is it as simple of backing up the database on 2003 and restoring it on 2008?

serchlop - were you going from x86 to x64? Did you backup the database in 2003 and restore in 2008?

I really do not have a way to test it right now.

This will work fine, did this also from 2003 to 2008 R2

and this was going from server 2003 32 bit to server 2008 64 bit?

The process would be pretty much the same, 2008 R2 is only 64 bit software.

The migration guide provided in a previous post is for windows 2008 and 2008 R2. Also the kb article provided by serchlop describes the steps to take in a relative easy way

I think there must be some misunderstanding on the part of some of our experts....

I know it's already been said by serval experts already.... but, no... you can NOT perform an "an in-place upgrade" from any 32-bit windows to any 64-bit windows.  Period.

It will be 2 seperate servers and moving DHCP between the two. Sorry for the confusion.

OK, nevermind...  the misunderstanding was on my part

I'll step down off my soapbox now  :)

Update: I backed up the DHCP database on the 2003 machine. Copied the folder to the 2008 machine and did the restore option in DHCP. The address leases and reservations did not come over also once the server is restarted the DHCP service will not start anymore. I am going to try the move based on serchlop's directions.

This worked beautifully. However, it was just 2003 x86 to 2008 x86. I still do not know fully if this would work on x64 but I know where to start and would not see why it wouldn't. Thanks!