1.) Log in on login.microsoftonline.com with your normal NARS account, and then select "Outlook" from the Apps section on the homepage to launch it.
2.) Once the web version of Outlook has launched, click on your profile logo at the top right, and then select "Open another mailbox."
3.) You can then begin entering the letters from the name of the mailbox in question to do a search (in this case, Transcription). Once it's found, you can then just click on it, and then select "Open."
4.) With the mailbox now open, select the gear at the top right to open the Settings menu, and then select "View all Outlook settings."
5.) Once the Settings window has opened, you can then select "Automatic Replies" and then specify your intended parameters. Just be sure to "Save" once everything's been entered.