ITExperience.NET

Due to some reconfiguration, I turned off a domain controller. Everything seemed to be working fine, until a few people complained about authentication errors on a Java-environment. Because I wanted to fix this problem quickly, I edited my DNS-record in Active Directory: I pointed my turned-off server (DC2) to the IP-address of a running DC (DC1). This seemed to be working, until a few people faced an error on the logon script: “Logon failure: the target account name is incorrect“.

After a migration from Exchange 2003 to Exchange 2007, some users may experience problems while connecting to Outlook Web Access (OWA). When they try to logon, they face the following error:

During a migration of Exchange 2000 or Exchange 2003 to Exchange 2007, the following error may occur:

Error was found for Username(user mail address) because: Error occurred in the step: Opening source mailbox. Failed to open mailbox with error: ClassFactory cannot supply requested class, error code: -1056749262

In a mixed environment with Exchange 2003 and Exchange 2007, you may get the following error:

—
Last name, First name
Failed

When you try to use the Export-Mailbox command in Exchange 2007 for the first time, it is very likely that you will face a couple of errors. Although I can describe all the errors you have probably seen, it’s better to start all over with the basic needs: