Setup Microsoft Teams Backup with Retention Policy - How to Repair Outlook PST File When It Fails to Start-Windows Security Proxy Sync Error Fix

Updated 2026-06-14 06:54:45cloud-software

Setup Microsoft Teams Backup with Retention Policy - How to Repair Outlook PST File When It Fails to Start-Windows Security Proxy Sync Error Fix

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.