Troubleshoot Microsoft Outlook Web Access Log On Failures In Exchange 2003.

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“HTTP Error 401.1 – Unauthorized: Access is denied due to invalid credentials” error message crops up whenever I am trying to log on to Outlook Web access via Exchange 2003. What can be done?

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Answered By 0 points N/A #298620

Troubleshoot Microsoft Outlook Web Access Log On Failures In Exchange 2003.

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It may be possible that the Basic Authentication Default Domain (BADD) property is set to the character backward slash (\) in your IIS.

To resolve issues with Exchange 2003, you need to ensure that you use correct authentication methods. Not only that, you have a check for the correct permissions to the Exchange folders.

The IIS change can be overwritten by entering the username in the format of domain\username, even if a backslash has been entered as the default domain. The network basic input/output system (NetBIOS) name of your domain can also be set as the default domain, as a trick to crack the authorisation issue. This, along with a backslash must now be used to run Exchange 2003, on your Windows server.

Note that all modifications must reflect in the Exchange System Manager for Outlook Web access. Follow these simple steps to do so:

1. Go to Start–> Programs–>Microsoft Exchange

2. Click on System Manager. Expand Servers.

3. Click Server Name–>Protocols–>HTTP

4. Double click on Exchange Virtual Server.

5. Right-click Exchange, Go to Properties–>Access–>Authentication

6. Tick mark the Basic authenticationcheckbox

7. In Default domain box, type the NetBIOS name of your domain and type a backslash and click OK.

8. Then right click Public virtual directory–>Properties–>Access–> Authentication and tick mark Basic Authentication

9. Click OK. Quit Exchange System Manager.

Vola! That’s it!

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