751e44c4__Error_Codes___ServiceNow_Wiki__Description
[Error / Data Code] 49 / 568 [Error] ERROR_TOO_MANY_CONTEXT_IDS [Description] 
Indicates that during a log-on attempt, the user's security context accumulated too many security IDs. This is an issue with the specific LDAP user object/account which should be investigated by the LDAP administrator.
LDAP Error Codes - ServiceNow Wiki
Description