M365 disconnects my Dropbox account every single day

I've also seen Dropbox accounts mysteriously disappear from Word and Excel on iPad/iPhone almost daily—just like others here have mentioned. For years, everything worked seamlessly. But in the past few months, something clearly changed, and it seems to be affecting not just Dropbox, but also other third-party storage services like Egnyte (as Jimmyroot mentioned).

What’s puzzling is that this isn’t isolated to one platform or a single user. It looks like a broader issue—possibly tied to a policy shift, authentication timeout, or background app behavior in newer M365 versions.

Here’s what I’ve tried (maybe it helps someone):

• I reinstalled both the Dropbox and Office apps.
• I disabled Background App Refresh and re-enabled it.
• I ensured Dropbox has full access permissions set in iOS settings.
• I checked for any recent device profile changes or security settings that could be causing token expirations.

None of these fixed the issue long-term, unfortunately.

I’d really encourage everyone to keep submitting feedback through the in-app support and also open a support ticket directly with Microsoft and/or Dropbox. More visibility might get this escalated faster.

If anyone finds a workaround or explanation, please post it here. You're definitely not alone!