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.