An event is logged every 15 minutes on the computer that is running the Exchange Management Pack for Management Operations Manager 2005

An event that is similar to the following event is logged every 15 minutes on the computer that is running the Microsoft Exchange Management Pack for Microsoft Operations Manager (MOM) 2005:

Event ID: 19998
Description: OWA Logon failed. URL: undefined
Cannot measure OWA availability. Unexpected error.
No Exchange virtual servers and virtual directory (SSL enabled) can be found on this server to form a valid url. Try providing the url in the custom urls registry key (see Configuration guide for detail)
This event was generated by the script: "Exchange 2003 - OWA logon verification"

This issue occurs when the primary SMTP address that is defined on the mailbox access account does not match the SMTP address in the default recipient policy in Microsoft Exchange Server 2003. The event is logged by the synthetic Outlook Web Access verification logon script in MOM 2005 when the script cannot log on by using the mailbox access account.

To resolve this issue, you must change the mailbox access account's primary SMTP address to match the address that is defined in the default recipient policy. To do this, follow these steps:

1. Open the Active Directory Users and Computers snap-in.
2. Move to the container that contains the test account user.
3. Right-click the mailbox access account object, and then click Properties.
4. Click the E-mail Addresses tab.
5. Click the entry for the primary SMTP address. This entry has the label SMTP in capital letters and in bold under the Type column.
6. Click Edit.
7. Change the entry in the E-mail address box to match the entry in the default recipient policy. Consider the following example:
   • The mailbox access account's primary SMTP address is "MyserverMOM@mail.adatum.com"
   • The default recipient policy e-mail address is "@adatum.com"
   In this case, you must change the mailbox access account's primary SMTP e-mail address to "MyserverMOM@adatum.com"
8. Click to clear the Automatically update e-mail addresses based on recipient policy check box.
9. Click the Exchange Advanced tab.
10. Make sure that the Hide from Exchange address lists check box is cleared.
11. Click OK.
12. Exit the Active Directory Users and Computers snap-in.