@Teo Heras
Yes, Exchange cached mode uses more paged pool than online mode. I'm still working on providing more detail and recommendations for a KB article, so take what I say here as preliminary only.
An online user will typically cause 3 or 4 copies of the token to be generated, while a cached mode user requires 6 to 8 copies. This can go up if you have public folder and free/busy access happening on the mailbox server.
Here's a quick and dirty way to estimate how many copies a particular Outlook 2003 user is generating (this will typically estimate a little high):
Ctrl+right click the Outlook 2003 icon in the system tray. This exposes the Connection Status dialog. On that dialog, count the number of connections listed for a particular server.
Now, run netstat -o and count the connections going to the Exchange server.
Add these together and add 2, and that gives you a decent estimate of number of connections.
The logons page in ESM does not give you an accurate count, for this purpose.