I am experiencing an issue during the initial configuration of a new WSUS server.

길희 한 0 Reputation points
2026-07-02T01:24:55.92+00:00

Environment:

  • OS: Windows Server 2022

WSUS: Newly installed

Update source: Microsoft Update

Proxy: Not used

Network: TCP 80/443 access to Microsoft Update is allowed

WSUS content directory: D:\WSUS

IIS content access test: anonymousCheckFile.txt is accessible

WSUS post-installation was completed with CONTENT_DIR=D:\WSUS

During the initial synchronization with Microsoft Update, the synchronization progress stays at 0%. The SoftwareDistribution.log repeatedly shows the following errors:

SqlException occurred. Number 50000 and message invalid update identity in XML for update {GUID}\100

SqlException occurred. Number 50000 and message invalid update identity (AtLeastOne Prerequisite) in XML for update {GUID}\200

CatalogSyncAgentCore.ImportMultipleUpdates imported 0/1000 updates in 1 iterations; 1000 will be retried

The issue is not limited to a single update. The same error occurs repeatedly for many different update GUIDs and revisions.

Actions already taken:

Verified internet access to Microsoft Update

Verified that no proxy is configured

Verified WSUS content directory access

Verified IIS WSUS content access

Ran wsusutil.exe postinstall CONTENT_DIR=D:\WSUS

Restarted WsusService and IIS

Retried synchronization from the WSUS console and PowerShell

Ran WSUS Server Cleanup

Confirmed that the issue persists

Based on the logs, the issue appears to occur while WSUS is importing Microsoft Update metadata into SUSDB. The error seems related to update identity, revision, or prerequisite metadata validation.

Could this be a known Microsoft Update metadata issue affecting new WSUS initial synchronization?

Is there any recommended workaround or fix for this issue?Environment:

OS: Windows Server 2022

WSUS: Newly installed

Update source: Microsoft Update

Proxy: Not used

Network: TCP 80/443 access to Microsoft Update is allowed

WSUS content directory: D:\WSUS

IIS content access test: anonymousCheckFile.txt is accessible

WSUS post-installation was completed with CONTENT_DIR=D:\WSUS

During the initial synchronization with Microsoft Update, the synchronization progress stays at 0%. The SoftwareDistribution.log repeatedly shows the following errors:

SqlException occurred. Number 50000 and message invalid update identity in XML for update {GUID}\100

SqlException occurred. Number 50000 and message invalid update identity (AtLeastOne Prerequisite) in XML for update {GUID}\200

CatalogSyncAgentCore.ImportMultipleUpdates imported 0/1000 updates in 1 iterations; 1000 will be retried

The issue is not limited to a single update. The same error occurs repeatedly for many different update GUIDs and revisions.

Actions already taken:

Verified internet access to Microsoft Update

Verified that no proxy is configured

Verified WSUS content directory access

Verified IIS WSUS content access

Ran wsusutil.exe postinstall CONTENT_DIR=D:\WSUS

Restarted WsusService and IIS

Retried synchronization from the WSUS console and PowerShell

Ran WSUS Server Cleanup

Confirmed that the issue persists

Based on the logs, the issue appears to occur while WSUS is importing Microsoft Update metadata into SUSDB. The error seems related to update identity, revision, or prerequisite metadata validation.

Could this be a known Microsoft Update metadata issue affecting new WSUS initial synchronization?

Is there any recommended workaround or fix for this issue?

Windows for business | Windows Server | Devices and deployment | Install Windows updates, features, or roles
0 comments

Answer accepted by question author

Jason Nguyen Tran 21,375 Reputation points Independent Advisor
2026-07-02T02:13:29.03+00:00

Hi 길희 한,

Based on the logs and behavior you described, this isn’t a simple connectivity or proxy issue. The errors you’re seeing (invalid update identity in XML, repeated retries during import) point to WSUS struggling with metadata validation when synchronizing against Microsoft Update. This has been observed in certain cases with new WSUS installations on Server 2022.

Here are some recommended steps and considerations:

Apply the latest cumulative update for Windows Server 2022: WSUS relies heavily on the underlying OS components, and metadata parsing issues have been addressed in recent patches.

Install the latest WSUS hotfixes: Check for updates specific to WSUS on Server 2022, as Microsoft occasionally releases targeted fixes for synchronization problems.

Run a database reset: Use wsusutil.exe reset to force WSUS to re-check and re-download update metadata. This can clear out corrupted or incomplete entries.

Consider declining superseded updates: Large volumes of outdated metadata can sometimes trigger import errors. Running the WSUS Cleanup Wizard to decline superseded updates before retrying sync can help.

Check SUSDB health: Run SQL Server checks on the SUSDB to ensure there are no integrity issues. If corruption is suspected, rebuilding the database may be necessary.

At this point, it does look like a known metadata parsing issue rather than a misconfiguration on your side. Microsoft is aware of similar cases, and the recommended workaround is to ensure your WSUS server is fully patched and then retry synchronization after a reset.

In short: patch Server 2022, apply WSUS updates, run a reset, and retry sync. If that doesn’t resolve it, escalate to Microsoft Support for catalog validation.

I hope the response provided some helpful insight. If you find this answer useful, please hit “accept answer” so I know it addressed your concern.

Jason.

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