After updating WSUS to WSUS SP1…
- You might see Red X on WSUS Updates Window in WSUSAdmin console and eventually Synchronization fails.
- Content file download failed. Reason: The parameter is incorrect. Source File:
- Source: Windows Server Update
Event ID: 386
Synchronization failed. Reason: The underlying connection was closed: Unable to connect to the remote server.
This is a known issue. Once you upgrade to WSUS SP1, you might want to re-configure Synchronization Options (proxy settings – proxy password) in WSUSAdmin console as they are lost during the upgrade.
Save the settings and perform a manual sync to download the updates. Did it work for you?