If mobile.pipe.aria.microsoft.com is blocked the App flood the network with constant DNS Requests.
I'm using one DNS Blocker and I noticed that when mobile.pipe.aria.microsoft.com is blocked the Android App (even while not open on the mobile) goes into a infinite loop of new DNS requests searching for mobile.pipe.aria.microsoft.com address every 10 secs.
I had to uninstall the app to fix this problem.
Thank you for using Outlook and letting us know about your current experience. We really appreciate your support.
We have helpful and knowledgeable colleagues over at the Help section of the app that would be happy to address this concern. Please reach out to them by going to the app’s Setting > Help and Feedback > Contact Support.
We look forward to fixing this for you.
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.
[Deleted User] commented
Same here, over 4000 hits today on iOS
Stefan Hassel commented
still flooding the network also on iOS devices - when will you stop this?