Fix Outlook “Downloading Messages” Issue on iPhone
Question
Hi All,
I have a user with an iPhone and Outlook. It has been working without any problems for 4 years. And last week Outlook is just showing “downloading messages”. Works fine on PC and online.
What I have done:
Uninstalled the company portal and reinstalled the company portal
Uninstalled Outlook and reinstalled
Removed accounts and added again
Opened settings inside the Outlook app –> Selected the correct accounts –> Reset account
Waited 24 hours for possible sync on different networks
Removed the profile –> Reinstalled the profile
It also dose not work on a new device.
What can I try next?
Posted by Jacob Engelmann Olsen in HTMD FB Group

Answer ( 1 )
For More Details Best Guide to Set New Outlook as Default Mail Client with Intune
https://www.anoopcnair.com/new-outlook-as-default-mail-client-with-intune/
Replied by Renee Dick
Any chance this device has an old OS version? I beleive there was an advisory /announcement about desupporting outlook on older versions of the app on certain browsers/os. See below:
MC801980 | June 18 – Starting mid-July 2024, legacy Outlook clients will be retired, affecting users with outdated versions on iOS, Android, Mac, and Windows Mail and Calendar applications. From mid-August, outdated browsers will receive an error on Outlook web. Users must update to the latest versions for continued functionality and support.
https://admin.microsoft.com/AdminPortal/home
Replied by Daniel Barga
Probably an expired Apple MDM Push Certificate
Replied by Jacob Engelmann Olsen
anyone ?