If you enable this policy, it means that you configured PDS to run under domain account, so admin tools use service specific SPN (Svc/AdmPwd) when connecting to PDS.
If you disable or not configure this policy, it means that you configured PDS to run under NETWORK SERVICE account, so admin tools use default SPN (HOST/computerfqdn) when connecting to PDS.
Registry Hive | HKEY_LOCAL_MACHINE |
Registry Path | Software\Policies\Microsoft Services\AdmPwd |
Value Name | UseSharedSPN |
Value Type | REG_DWORD |
Enabled Value | 1 |
Disabled Value | 0 |