Currently "select all", need press again "3 dots" and choose next step. Suggest auto show next choices after select mails.
Thank you for using Outlook Mobile and sharing your ideas with us. We really appreciate your support.
It is currently already possible to select multiple emails at once. To do so, long press on an email until a checkmark appears at the left of it. Once you’ve selected multiple emails, you’ll then be able to perform mov actions on them, like moving, deleting, marking as read/unread, archiving… A “Select All” option will also appear in the top right corner.
Having trouble finding the feature? Let us know through the Help section of the app. You may reach them by going to the app’s Setting > Help and Feedback > Contact Support
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.