How to configure Outlook 2007 Discover locally

If you have two organizations with spilt DNS to share the same SMTP domain xyz.com. You can only configure DNS SRV record for one Exchange 2007 organization. For the other Exchange 2007 users with Outlook 2007 SP2 or later  you would like to "disable" the autodiscover feature from Outlook 2007 client end. However, we cannot disable the autodiscover feature from Outlook 2007 client. You can only select "Manually configure server settings or additional server types" when configuring new Outlook profile without autodiscover feature. After that Outlook 2007 will use autodiscover feature for downloading OAB, querying Free/Busy information etc. So, the workaround is that you can configure one autodiscover DNS SRV record for one Exchange organization. Or you can configure autodiscover for locally. For more information, please refer to the following article: Automatically configure Office Outlook 2007 user accounts http://technet.microsoft.com/en-us/library/cc511507.aspx