Network requirements and troubleshooting, Proxy server – Microsoft Surface Hub 2 SmCamera User Manual
Page 380

Compare the OS build number the Surface Hub is running with the
page to see which updates are missing. The current Surface Hub OS version is
(22H2 / 19045). More details on how to do this are
covered in the
Surface Hub.
If you have a proxy server configured and Windows updates either don't download or
remain stuck at 1% progress, it can be caused by the following:
SSL inspection
Cache updates from Windows Update
Block support for partial file download (HTTP range headers)
Windows update uses dynamically created temporary file names that differ for each
computer that downloads updates. This eliminates any benefit that might be gained
from caching. Windows update also uses the Background Intelligent Transfer Service
(BITS) as a client, which can request partial files, an operation the proxy may not
support.
To resolve this issue, ensure the proxy doesn't perform any of the above operations on
Third-party information disclaimer
Network requirements and troubleshooting
Proxy server