Different Autoconfig being sent to Outlook clients?

Hi,

I have a weird issue on a separate site... I have 2 exchange servers on site A

Users on site B connect to site A to get their email.

Out of Office works fine for everyone on Site A. Out of Office on Site B does not work for anyone except for one person. Comparing the Autoexc.xml I can see the difference:

On one machine the autoconfig is requiring SSL and on the others it isn't.

        <Type>EXPR</Type>

        <Server>domain.local</Server>

        <SSL>On</SSL>

and

        <Type>EXPR</Type>

        <Server>domain.local</Server>

        <SSL>Off</SSL>

How can 2 machines get different autoconfigs?

I have checked the IIS on both Exchange servers and the configs match...