A user launches IE8 on a Windows XP Pro SP3 workstation within a Windows 2008 domain and attempts to connect to OWA on the internal Exchange server. The user logs in fine using the "This is a private computer" option. The landing page with the folders, email, etc displays very briefly (half a second) and then is replaced with a page containing the following message: "The ActiveX control needs to be enabled in Internet Explorer for Outlook Web App to work correctly. Click here to sign out, enable the ActiveX control, and then sign in to Outlook Web App.
The Exchange server (http://servername
) has been added to Trusted Sites. All IE Add-ons are seemingly Enabled, although there are no add-ons which contain "owa" in their name. Most of the "ActiveX controls and plug-ins" settings in IE security options are set to either Enabled or Prompt.
This behaviour is the same for other users on this workstation, but other workstations in the domain behave as expected, i.e. OWA launches fine.