For Microsoft Office Outlook 2007

To turn the Out of Office Assistant on:

1. On the Tools menu, click Out of Office Assistant
2. In the Out of Office Assistant dialog box, click I am currently Out of the Office
3. In the AutoReply only once to each sender with the following text box, type the message that you want to send while you are out of the office.
4. Click Ok to action the change

To turn the Out of Office Assistant off:

1. On the Tools menu, click Out of Office Assistant
2. In the Out of Office Assistant dialog box, click I am currently in the Office
3. Click Ok to action the change

For Microsoft Office Outlook 2013 and 2010

To turn the Out of Office Assistant on:

1. Click the File tab, and then click the Info tab in the menu.
2. Click Automatic Replies (Out of Office).3. In the Automatic Replies dialog box, select the Send Automatic Replies check box.
4. If you want to specify a set time and date range, select the Only send during this time range check box. Then set the Start time, and then set the End time.
5. In the Inside my organization tab, type the message that you want to send within your organization, and in the Outside my organization tab, type the message that you want to send outside your organization.
6. Click OK.
7. If you selected the “Only send during this time range” option in step 4, the Automatic Replies (Out of Office) feature will continue to run until the date and time set for the End Time in step 5 is reached.
Otherwise, the Automatic Replies (Out of Office) will continue to run until you repeat step 1 and select the “Do not send automatic replies” option.

To turn the Out of Office Assistant off:

1. Click the File tab, and then click the Info tab in the menu.
2. Under the Automatic Replies (Out of Office) section you should see a 'Turn off' button, click this to turn off Automatic replies (Out of Office).