From the Outlook Desktop Client
Select File and then click Automatic Replies.
In the Automatic Replies box, select Send automatic replies. Optionally, set a date range for your automatic replies. This will turn off automatic replies at the date and time you enter for the end time. Otherwise, you'll need to turn off automatic replies manually.
Select OK to save your settings.
From webmail.ism.lt
Sign in and click the Settings Icon in the top-right area of the page. Then, click on Automatic replies
In the Automatic Replies box, select Turn on automatic replies. Optionally, set a date range for your automatic replies. This will turn off automatic replies at the date and time you enter for the end time. Otherwise, you'll need to turn off automatic replies manually.
Type the reply you want to be sent to people who email you while you're out, and then click 'SAVE' at the bottom to save your settings.