For a Microsoft Exchange 2000 Server version of this article, see 262352.
By default in Microsoft Exchange Server 2003, the sending of out-of-office reply messages to the Internet is disabled. Many administrators do not allow out-of-office reply messages to be sent outside the Exchange organization to prevent unauthorized people from learning when users are out of the office.
To enable out-of-office reply messages to the Internet, follow these steps:
Start Exchange System Manager.
Double-click Global Settings, and then click Internet Message Formats.
In the details pane, right-click a domain name, and then click Properties.
Note By default, "*" is the SMTP domain.
In the Default Properties dialog box, click Advanced, and then click to select the Allow out of office responses check box.
This allows out-of-office reply messages to be sent under this SMTP policy.