751e44c4__Error_Codes___ServiceNow_Wiki__Description
[Error / Data Code] 49 [Error] LDAP_INVALID_CREDENTIALS [Description] 
Indicates that during a bind operation one of the following occurred: The client passed either an incorrect DN or password, or the password is incorrect because it has expired, intruder detection has locked the account, or another similar reason. See the data code for more information.
LDAP Error Codes - ServiceNow Wiki
Description