In a cluster environment, when you try to install a Microsoft Exchange service pack on a node that is running Microsoft Exchange Server 2003, you receive the following error message:

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This problem occurs if the name of the default mailbox store includes a comma (,) or another special character. For example, this behavior occurs if the display name of the default mailbox store resembles the following display name: For more information about characters that are not supported for object names in Exchange, click the following article number to view the article in the Microsoft Knowledge Base:

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To work around this problem, follow these steps:

1.	In Exchange System Manager, change the name of the default mailbox store to a name that does not include a comma or a special character. For example, change "Mailbox Store,(Server_Name)" to "Mailbox Store(Server_Name)".
2.	Install the Exchange service pack on the node.
3.	Change the name of the default mailbox store back to the original name.

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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