PVS 1912CU5 on Windows 2012 R2 with KB501874: The specified AuthGroup does not exist
Article ID: CTX463744
Updated On:
Description
PVS console fails to login with error: "The specified AuthGroup does not exist".
Resolution
Add following registry entry in PVS server
HKLM\system\currentcontrolset\control\lsa /v SpnDowngradeProtection /t REG_DWORD /d 0 /
HKLM\system\currentcontrolset\control\lsa /v SpnDowngradeProtection /t REG_DWORD /d 0 /
Problem Cause
Authentication not being able to pass 3-part SPN.
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