Autodiscover External OWA URL changes

Hi Experts,
we are running on exchange 2010 with SP2, spread across 2 datacenters. 1st and major is in EMEA and another is in APAC.
A top management guy sitting in EMEA reported that he is able to see ASIAPAC webmail server URL in account setting of his outlook 2010 (screenshot 1). when i run test email auto configuration on my outlook i also able to see that (screenshot 2).

Now we want to change it to EMEA webmail URL so please let me know where i can see this configuration and how i can change it ?
pdixit1977Asked:
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Simon Butler (Sembee)Connect With a Mentor ConsultantCommented:
That information comes from Exchange and there isn't much you can do to modify it. It is generated by the Autodiscover process based on the information within Exchange.
The information it uses is found on the configuration of the virtual directory for OWA.

Have you checked any other users to see if it is just something about that one user?

Simon.
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Simon Butler (Sembee)ConsultantCommented:
Where does Autodiscover point?
The URL comes from the point closest to his mailbox. It isn't something that you control other than by setting the relevant URL on the relevant CAS role holder.
The only reason I can think it is different is because your Autodiscover traffic is going somewhere it shouldn't be - usual cause of that is DNS configuration error, AD site and services error or the same Autodiscover URL configured internally across the entire Exchange org.

Simon.
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pdixit1977Author Commented:
The URL comes from the point closest to his mailbox : how can i find which CAS is relevent to which mailbox ?

At EMEA i have 4 servers and each server from these 4 is catering HUB+CAS+Mailbox roles.
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Simon Butler (Sembee)ConsultantCommented:
It is all AD site aware, so the closest CAS role holder will be the one in the same AD site as the mailbox server.

Simon.
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pdixit1977Author Commented:
ok, what i will do i will check external URL on each CAS at EMEA as well as at APAC.

what is the command to get OWA external URL on all CAS server OR each server ?
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Simon Butler (Sembee)ConsultantCommented:
External URL has nothing to do with it.
Autodiscover externally only goes to one host name usually - autodiscover.example.com. Autodiscover then takes the details and returns the correct information for the user requesting them.

Simon.
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pdixit1977Author Commented:
Okay.

Outlook of EMEA users showing external URL of APAC owa in outlook's file > info > account setting

Ideally EMEA user should see EMEA URL and APAC users should see APAC but its not happening, how and where should i start troubleshooting..
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pdixit1977Author Commented:
thanks
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