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[Thomas Swan]

Simone wrote:

> First of all thank everyone for your replies.
>
> I haven't been clear on one point, my fault. We have to stay on 
> Exchange, and users have to keep on using Outlook Web Access, this is 
> a must in my situation. But we considered that users can connect 
> directly when in the office, and from home or wherever they can use 
> web access, so imap is not a requirement right now  ;-).
> We would like to have a front web server that could redirect to the 
> correct exchange web page depending on the login. In this scenario, 
> even if I have no experience with reverse proxying, it looks to me 
> like the best solution (any other tip or different opinion is very 
> welcome). If I'm not misunderstanding it, it looks like we could have 
> 1 only web server with a public IP, and the users would be redirected 
> to the correct Outlook web access.
>
Actually, what you would want to do is write a login page which 
authenticates against the LDAP part of ActiveDirectory or Exchange. 
(There are some good example PHP pages out there) Then you can get the 
exchange server information and do a redirect to it.