You can send an automatic reply to your customers or clients when you are away from work right from your smartphone using the Out of Office feature in Outlook. Before that, you have to configure your email account on your Android mobile phone.The simple steps to set up your email account and the Out of Office Outlook 365 App Android are provided on this page.
On your Android mobile phone, locate the Google Play Store icon and tap it.
Relaunch the Microsoft Outlook app on your Android mobile phone.
Navigate to Menu and select the Settings icon.
Go to the Accounts section and choose your Office 365 email account.
Turn on the Automatic Replies toggle.
Select the Reply to everyone or Reply only to my organization option depending on your need.
Compose an email message that you want to send as an automatic reply.