Hi,
Thank you for sharing your question. I understand how inconvenient it is when an attachment opens but won’t save, especially when the loading screen freezes and nothing progresses.
Attachment download issues in Outlook for iOS usually happen when the app cache becomes corrupted, the network connection is unstable, or the app needs an update. Microsoft guidance explains that clearing the Outlook app cache, checking internet stability, updating the Outlook app, or reinstalling it often resolves issues where content or attachments fail to download. Additional troubleshooting steps recommend offloading the Outlook app from iPhone Storage to refresh cached data, switching between Wi‑Fi and mobile data, resetting network settings, or removing and re‑adding your account if syncing is stuck or attachments stall during download.
Please feel free to follow up with any additional details or screenshots I’m here to help you get attachments downloading smoothly again.
I hope this helps.
Best Regards,
Noel