Secondary site server SUP is failing to sync with Primary site server SUP

Question

SCCM – Secondary site server SUP is not syncing with Primary site SUP .
It fails with below error and could not interpret what it means.
Secondary SUP is newly built and there is no update in susdb which rules out clean up process issue
Wsyncmgr.log from secondary sup fails with below error
Sync failed: UssInternalError: InvalidOperationException: . Source: Microsoft.SystemsManagementServer.SoftwareUpdatesManagement.WsusSyncAction.WSyncAction.SyncWSUS

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S 2025-01-12T03:37:54+05:30 1 Answer 44 views Beginner
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Answer ( 1 )

  2. VAISHNAV K
    1
    2025-07-31T16:27:55+05:30
    Reply

    Hi,
    That error usually indicates that the secondary SUP (Software Update Point) can’t complete the WSUS synchronization with its upstream (the primary site SUP) because WSUS on the secondary can’t interpret or process the sync request.

    Some Typical Fixes are below,
    * Reconfigure WSUS on the secondary site server:
    * Remove the SUP role.
    * Uninstall WSUS role (but keep SUSDB).
    * Reinstall the WSUS role with the same DB.
    * Run wsusutil postinstall.
    * Add SUP role back.

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