Fix SSH Host Key Verification Failed in Ansible - How to Resolve OneDrive Sync Error 0x8004de40 on Linux-Outlook Sync Not Working? Try These Fixes

Updated 2026-06-15 20:43:50office-tools

Fix SSH Host Key Verification Failed in Ansible - How to Resolve OneDrive Sync Error 0x8004de40 on Linux-Outlook Sync Not Working? Try These Fixes

Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

Restart the affected app after changing permissions or configuration files.
Test the same workflow in a clean browser profile or a temporary user account.
Compare the result on another network if the error may be connection related.