Hello,

Thank you for posting here.

According to your description, I understand that:

You have 2 Windows Sever 2003 server on the VMWare ESX server and joined to the domain manually. However, you find that you have not sufficient permission on the domain resources.
If I have misunderstood the problem, please don't hesitate to let me know.

Suggestions:
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From the description, it seems to be a frequently encountered issue with Internet Explorer 7 with Enhanced Security due to its stronger security
protection. To resolve this issue, add the UNC path of the network location and the companyweb to the Trusted sites zone of Windows Internet Explorer 7 with the following steps:

To add the UNC path and companyweb of a network location to the Trusted sites zone, follow these steps:

1. Close all active Windows Internet Explorer 7 windows.
2. Start Windows Internet Explorer 7.
3. On the Tools menu, click Internet Options.
4. In the Internet Options dialog box, click the Security tab.  
5. On the Security tab, under Select a zone to view or change security settings, click Trusted sites, and then click Sites.
6. In the Add this website to the zone box, type the UNC path and companyweb of the network location, and then click Add.
For example, type \\Server\Share and http://companyweb.
Note In this example, Server represents the NetBIOS name of the server. Share represents the shared folder where the file is located.
7. Click Close, and then click OK to close the Internet Options dialog box then check how it works.

942091 You may be unable to run an executable file or a script file from a UNC path when you have Windows Internet Explorer 7 installed on a Windows Server 2003-based computer
http://support.microsoft.com/?id=942091

If the issue persists, please help to collect the following information for further investigation.