Since early 2025, users have faced trouble accessing Microsoft 365 mailboxes through the Samsung Mail app. Reports suggest that the problem is inconsistent—some accounts work fine, while others don’t, even on the same device. This issue seems tied to app version 6.2.01.1 (released February 12, 2025). Both Microsoft and Samsung acknowledge the problem but appear to be passing the blame.
A Bizarre Fix That Works
A blog reader stumbled upon an unusual solution: installing the Microsoft Authenticator app and disabling its battery optimization setting. Here’s how it works:
- Download and install Microsoft Authenticator from app store.
- Go to your phone’s settings, locate the app under “Battery Optimization,” and turn off optimization for it.
- Open the Samsung Mail app and check if syncing resumes normally.
Users report that even after uninstalling the Authenticator app, the issue returns—suggesting a strange dependency between these apps.
Alternative Fixes
- Revert to an Older App Version: Downgrade to a version of Samsung Mail released before February 2025.
- Adjust Samsung Mail Permissions: Disable energy optimization for the Samsung Mail app in Android settings.
- Switch Email Apps: Temporarily use Outlook or another email client until a permanent fix is released.
The exact cause remains unclear, but some suspect a link between Microsoft’s March 2025 server issues and changes in Samsung Mail’s behavior. It’s likely a global issue, but its sporadic nature makes it difficult to diagnose. While this workaround may seem odd, it has helped many users regain access to their mailboxes. Until Microsoft or Samsung provides an official fix, these steps could save you a lot of frustration.