The following entries are repeatedly observed in pma_isv_proxy_service.log:
07-30 14:03:15.433 D /AdsiWrap:11180:40d8/ IADs::Get() returned 0x8000500d (Unable to obtain message text for error -2147463155 (reason 317)) for 'dNSHostName'
07-30 14:03:15.433 D /pma_isv_proxy_service:11180:40d8/ Skip DN 'CN=3333333,OU=test,OU=test-1,OU=users,DC=sub,DC=domain,DC=com': Unknown error
In other words, the AdsiWarp component cannot find dNSHostName property for the corresponding object (CN) in ADSI.
In most cases, this message can be ignored as it occurs when dNSHostName property has not been set yet.