Threads for mails just like in Windows 10 mobile
Thank you for using Outlook Mobile and sharing your ideas with us. We really appreciate your support.
Conversation or Thread view can be enabled in our app. To do so, please go to your App Settings page, scroll down to Organize Mail by Thread then toggle it ON.
Should you need further assistance with this feature, please contact us through the Help Section of your app which you can find in the in the Settings > Help and Feedback > Contact Support and we’ll be happy to assist you from there.
Thank you again for your support, we look forward to hearing more of your ideas very soon.
All the best
The Outlook Mobile Team
PS: Please use the Help Section of the app for any questions, we are not able to see replies to this address.
Peter Cox commented
Merge windows 10 mail with Outlook for Android