Allow Out of Office replies to external addresses (Exchange 2003)
Contrary to popular belief, by default Out of Office auto replies will only be sent to internal email addresses of the domain - not to addresses outside of the organisation. To allow Out of Office auto replies to be sent to external addresses:
- Open Exchange System Manager: Go to Start > Programs > Microsoft Exchange > System Manager.
- Expand Global Settings and click on Internet Message formats
- Choose the entry for your domain or choose Default, right click and go to Properties.
- Go to the Advanced tab, and tick Allow out of office responses.
Please note: This setting will only apply to new Out of office messages set; for this to apply to users currenty set to out of office it will need to be turned off and back on.