How can I establish a two way trust between a SBS 2008 domain and a Windows server 2003

No you can't do DOMAIN TRSUT in SBS.

You need to do a proper migration but you need to check if you can migrate from Exchange 5.5 into Exchange 2007.

Search for migrating Windows 2003 domain into SBS2008 there will be loads of post returned.

If you are not familiar with migration best way is to look at Swing migration (http://www.sbsmigration.com) - with an affordable price they provide you with tools to migrate Windows domain.

http://support.microsoft.com/kb/555073

Method B - Upgrade the current domain:
Obtain "Windows Small Business Server 2003 Transition Pack" and follow "Windows Small Business Server 2003 Transition Pack" installation instructions:
http://www.microsoft.com/WindowsServer2003/sbs/techinfo/overview/licensingfaq.mspx
Note: To migrate from SBS 2003 to Windows 2003 R2 Domain, you may need to upgrade the schema to R2.

Link to Transition Pack for SBS 2003 can't be found readily:

Here is more information:
http://tec-articles.blogspot.com/2008/01/migrate-from-sbs-2003-to-2003-standard.html


It looks like you can buy the software from online stores like Amazon, but I am wondering if SBS 2003 is no longer supported.  You may want to try upgrading to SBS 2008 first, meaning you would have to buy a new server (SBS 2003 is 32-bit, and 2008 is x64 only):
http://technet.microsoft.com/en-us/library/sbs-2008-2003-migration(WS.10).aspx

Dear all the problem is that I need to move from NON SBS Windows 2000 domain to a SBS 2008. There are just a little amount of users, so I have the option to re create all user on a new domain, the only thing important is that I need to be able to move the mailboxes from the old domain to the new one.

Cliff this sounds like a good option I am going to further research that scenario.
Thanks!

Cliff, apologies for my mistake but looks like exchange version Microsoft Exchange Server 2003 SP2. Also to further more add clarification the current enviroment is
All servers are running Windows Server 2003 with domain level 2000
The roles are divided as follows:
Server 1: Exchange, DHC
Server 2: DC
Server 3: DNS
For what I read your option still seems to be the correct way to go, but would really appreciate if you could confirm or ammend based on this information? Kind Regards

If you are on exchange 2003, you can use the SBS migration docs (even thought you are not yet on SBS) and move the mailboxes via SBS wizard. Easier than export/import. But otherwise, same as above.

-Cliff

How many users are you talking about? I recommend building a new domain from scratch if you have about 10 users. Migration takes a fair bit of time especially if you haven't done before - Microsoft recommend a 7 days process for migration but usually experienced technician can do in a weekend.

As Cliff said you can use Outlook to export/import mailboxes, or you can use Exmerge (only handles mailbox of size LESS than 2Gb) which is free. One reason not to migrate is that if you have a corrupted AD migration will bring that across too. So if you want to go down the migration route sort out all your issues within your domain first.

If you start a new domain, before you copy the data across you may need to grant Everyone Full access before moving them.

Hope this helps.

PS. Transition pack is no longer available.

Ok after running all updated and promotin DC 2003 with no errors, moving exchange from mixed to native, i run the Exchange best practice analyser for migration to Exchange 2007, nbut I get 1 error, which states" Active Directory domain Dc..blabla. Does not contain at least one domain controller running Windows Server 2003 SP 1 or later. This is required for the '/PrepareLegacyExchangePermissions' task when updating existing domains that have been previously prepared for exchange server.

All servers including the only DC are all running Windows Server 2003 R2 SP2  or Windows Server 2003 SP2

I am attaching the Best Practice analyser result.

Any clues or help would be really appreciated.
Thanks! ExBPA.SBS-2008-Migration.2011093.xml

Sounds like you have an outdated tool.

http://blogs.technet.com/b/sbs/archive/2010/03/26/source-server-does-not-meet-minimum-requirements-for-migration.aspx

We will be implementing this changes on Friday14th, please keep question open.

Raise your functional level to 2003 first then continue with the help you are getting, otherwise it wont work.

Postponed please do not close.