When you try to use Microsoft Outlook Web Access to connect to Microsoft Exchange Server 2003 in a front-end/back-end topology, you receive the following error message: After you rebuild the front-end server, the error still occurs.

Additionally, when you perform a Network Monitor trace, you receive the following error message when the trace operation looks up the location of the mailbox for the user's account: You may also experience the following issues when you try to connect to Microsoft Exchange Server 2003 in a front-end/back-end topology:

1.	The Outlook Web Access client stops responding.
2.	You receive an HTTP 500 error message on the Outlook Web Access client.

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This problem occurs if the Allow inheritable permissions from parent to propagate to this object check box has been cleared in the properties of the Exchange Server 2003 mailbox server object.

By default, the Allow inheritable permissions from parent to propagate to this object check box is selected when Exchange Server 2003 is installed. This check box may have been cleared by a custom policy, by a third-party program, or by another action.

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To resolve this problem, follow these steps:

1.	Start Exchange System Manager. To do this, click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
2.	Locate the Exchange 2003 object that contains the mailbox that is experiencing the error.
3.	Right-click the server object, and then click Properties.
4.	Click the Security tab, click the Advanced button, and then click to select the Allow inheritable permissions from parent to propagate to this object check box.
5.	Click OK. Click Yes if you receive the following message: Deny entries take priority over Allow entries
6.	Repeat steps 3 to 4 for each object that contains a mailbox that experiences this problem.

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