751e44c4__Error_Codes___ServiceNow_Wiki__Description
[Error / Data Code] 49 / 530 [Error] NOT_PERMITTED_TO_LOGON_AT_THIS_TIME [Description] 
Indicates an Active Directory (AD) AcceptSecurityContext data error that is logon failure caused because the user is not permitted to log on at this time. Returns only when presented with a valid username and valid password credential.
LDAP Error Codes - ServiceNow Wiki
Description