Out of Office: OOO!
When Microsfot Outlook is connected to an Exchange Server or Office 365, you can set the Out Of Office option. Here are the steps create Automatic Replies.
4.
Try it: Create an Automatic Reply
Go to File->Info->Automatic Replies.
Click on Send automatic replies.
Edit the reply with a sample message.
What Did You See? You can create a different messgae for replies sent to people Inside or outside of your organization.
Click OK to save the OOO setting.
That will work.