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Here is a list of issues found with WSUS RTM. For convenience, the issue list is divided in to server, client and content issues. If you find any bugs or other issues with WSUS RTM, please report them to Microsoft using the process described on the Report WSUS Bugs page.

NB: Now that WSUS has been released, information relating to all RC and B2 issue has been moved to Old WSUS Issues.

Known issues with WSUS RTM

Server

• WSUS on SBS: RESOLVED! See WSUS on SBS page for details on the workaround.
• WSUS 3 Automatic Approval EULA Gotcha: Approve all Critical/Security updates dosen't necessaily approve all Critical/Security updates.
• Content File Download Failed Access Denied: In some cases, download fails due to access control issues.
• Content File Download Failed The server does not support the necessary HTTP protocol: In some cases, download fails  if the server does not support necessary HTTP protocol.
• SelfUpdate Tree is not working: Clients may not be able to update to the latest WUS client software and communicate with the WUS Server.
• WSUS Sync Error: Unable to generate a temporary class while trying to synchronize Windows Server Update Services (WSUS) Server with Microsoft Update (MU).
• Index Out Of Range Exception: Windows Server Update Services encountered an error. Index was outside the bounds of the array.
• Slow Update Approval: WSUS is taking more time to approve updates.
• Using a SQL cluster as the WSUS back-end: Check out steps that others have used to move the WSUS database from a temporary SQL server to a production SQL cluster.
• Known Console Limitations: Known Console Limitations in WSUS 3.0

Client

• Client Configuration Checks & Known Issues: There are several known issues with the WSUS client and some configuration checks to run (posted by the WSUS team).

Content

•  All Updates Are NOT Synchronized: Not all updates are synchronized. Several notable updates are missing from WSUS.
• Office EULA Problems: EULA for Office Updates is missing.