OneDrive sync slow with CBC Windows sensor installed

Products

• Carbon Black Cloud Endpoint Standard

Issue/Introduction

Starting between October 7th-20th 2025, the Microsoft OneDrive application sync on some endpoints starts to work very slowly, or not at all. 

Environment

• Carbon Black Cloud Console: Current Version
• Carbon Black Cloud Windows Sensor: All Supported Versions
• Microsoft Windows OS: All Supported Versions
• Microsoft OneDrive: All Versions

Cause

In October 2025 a new set of default policy rules were pushed to ALL Carbon Black Cloud ORGs. One or more of these policy rule updates is affecting the OneDrive synchronization activity.

Resolution

Create a case with Broadcom Support with endpoint names experiencing the issue