Jay Kay

I use Vista Business, but I assume basic network portion would be the same.
Are you able to log on to the network with your Vista PC at all? Or, you are
logging in locally, then trying to run Outlook?

My first issue was not being able to login to our NT4 domain. Fortunately,
I attended Microsoft event one day, and got an e-mail address for Vista
project person. He told me to do this.
Start, All Programs, Administrative Tools, Local Security Policy, Local
Policies, Security Options, Network Security, select "Lan Manager
authentication level", change it to "Send LM & NTLM - use NTLMv2 session
security if negotiated".

Hope this will help you.

Since there are some apps which do not run on Vista, I run Virtual PC 2007,
and run Windows 2000 and Windows XP SP2 over it. Unfortunately, I cannot do
everything with Vista at this moment. As long as you are running equal or
older version of Windows on Virtual PC, you don't have to pay for the
licenses.

"BIEBER Grégory" wrote:

> Thank you but I made a personnal installation on a blank machine. Only Vista
> Enterprise and Office 2003 with all the last patches.
> I see that on our network we use two fixed port for exchange 5.5 (1227 &
> 1226) They seem not to be documented by microsoft... On the same network
> under XP all works fine. I've teste a telnet on these ports : it works. I've
> disabled the firewall. The problem is that when I configure my account it
> asks me the user & password again and again enless...
> Other Ideas ?
>
> "Jay Kay" wrote:
>
> > Are you the one who posted a problem with Internet connection before? I had
> > the same issues, Outlook 2003 not able to configure with Exchange 5.5, also
> > not able to go out to Internet. With my case, Norton Internet Security which
> > came with my PC blocking too much within our network. I turned off its
> > firewall (Windows Firewall should be OK to leave it on), and other features.
> > After that, I had no problem going out to Internet, and Outlook got
> > authenticated with Exchange 5.5 (NT4) network. Once in a while, our customer
> > bring his/her laptop to our company, and have problem going out to Internet.
> > I usually (always?) see them having Norton product. I would think Symantec
> > Corporate Edition with work better in corporate network environment even
> > though they are both from Symantec. I think Norton is for home. Sorry, for
> > the long message, but the bottom line is that Vista is not the cause.
> >
> > "BIEBER Grégory" wrote:
> >
> > > Hello,
> > >
> > > Why does Outlook 2003 do not connect to our Exchnage 5.5 (NT4) server under
> > > Vista ?