In Web Access I want to proxy to 2 separate mailboxes with the same account name but different domains. We host different companies on our e-mail system and they want the same account names like customerservice@domain1.com, customerservice@domain2.com.

After setting this up and granting proxy access, go to Web access, Proxy button and type in the name "customerservice" it fills in customerservice@domain1.com, arrow down it correctly shows me the second customerservice@domain2.com but when I hit the Login button it always logs me into customerservice@domain1.com. It will never allow me to login to the second account even if I type in customerservice@domain2.com. I have to type in customerservice.po.domain@domain2.com. Big pain for our users.