If you use the Out Of Office Assistant and turn on the out-of-office reply, the internal senders (on the local network) receive the automatic reply message, but external senders (on the Internet) may not receive the automatic reply.
By default, the out-of-office reply to Internet recipients is turned off. Many administrators do not allow out-of-office replies to be sent outside the Exchange Server organization, so that unauthorized people do not know when users are out of the office.
To turn on out-of-office replies to the Internet, follow these steps:
For additional information about how to turn on out-of-office replies to the Internet in Exchange 2000 Server, click the article number below to view the article in the Microsoft Knowledge Base:
262352 XCON: How to Enable Out-of-Office Replies to the Internet