Alert! The following steps were done using an Android phone, but the steps are the same on an iPhone.

Tap the Microsoft 365 icon in the upper left-hand corner.
Tap the Settings gear icon in the lower left-hand corner.

Tap the Microsoft 365 icon in the upper left-hand corner.

Tap the Settings gear icon in the lower left-hand corner.

Edit your signature. When you are done, tap the check mark in the upper right-hand corner.

Microsoft Outlook is an email application. In addition to email client services, Outlook includes features for managing calendars, tasks, contacts, and notes, helping users stay organized and productive. Learn how to manage your account, set up your Outlook email signature, specify out of office hours, and much more.

How to Change Your Email Signature on the Outlook Mobile App