Set up the first account with the supplied setup facility. That is the easiest. However these instructions will also work for the first account

In windows go into: Control Panel / mail / email accounts

Click on New…

and you get

 

Click next

The select “Manually configure…..

 

Then Next

And select “Microsoft Exchange or compatible service”

then Next

And enter the right server and username:

The click “More Settings”

And in the “Connections” tab down the bottom select “Connect to Microsoft Exchange using HTTP”

Then click “Exchange Proxy Settings…”

And fill the page in as appropriate (server names might be different to these)

Then OK and OK and Next

Then you will have to log in with the right username and password and the setup of the second account is complete.