Question : Moving to Exchange Server 2010 from 2003

Hi there
I'm looking at upgrading a small office (50 PCs approx) from Exchange 2003 to 2010.
The AD environment is Windows 2003.

Can I get away with purchasing just a single 64 bit Server for Exchange 2010 to host all the required Roles?

Also, will the Active Directory domain need to be upgraded to 2008 or is leaving it on 2003 ok?

Many thanks

Answer : Moving to Exchange Server 2010 from 2003

check if some
can execute the following  in toad
alter session set NLS_NUMERIC_CHARACTERS='.,'
/
and repeat
select to_number('123.45') from dual;

in your sqlpus you mention to_char instead of to_number : that is a different query
behaviour can be different for the same query as
sqlplus looks for a login.sql prior to connect and in that file settings as above can be changed

check your registry for NLS_SETTINGS that might be changed by your XE installation
for example
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ORACLE\KEY_XE
and check the same for toad