Microsoft Windows 7 clients cannot connect to Microsoft Exchange 2007 Autodiscover SCP (Service Connection Point) - Error 0x800710DD.

Microsoft Windows 7 clients cannot connect to Microsoft Exchange 2007 Autodiscover SCP (Service Connection Point) - Error�0x800710DD.

The issue is caused after enabling�Basic Authentication on the Autodiscover virtual Directory, and having a backslash (\) in the Default Domain option.

1. Open IIS Manager�on the Exchange 2007�Client Access Server Role

2. Expand the server name, then select the Autodiscover Virtual directory

3. Select Properties, then Directory Security�tab

4. Under Authentication and Access Control, click Edit

5. Clear the ( \ ) from the Realm and Default Domain text boxes. These fields should be left blank.

Steps to reproduce the issue:

1. Open IIS Manager on the Exchange 2007 Client Access Server�Role

2. Expand the server name, then select Autodiscover Virtual Directory

3. Select Properties, then�Directory Security tab

4. Under Authentication and Access Control, click Edit

5. Enabled Basic Authentication

6. On Default Domain type "\" (without quotes)

7. On Realm type "\" (without quotes)

8. Apply the options

9. Close and Re-open�Outlook 2007 client

10. Run Test E-mail Autoconfiguration

Result: The Windows 7 client should fail to connect to Autodiscover SCP with the following error�x800710DD, but a Windows XP client will continue to work.

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