Issues with Active Directory LDAP Bind

An error occurs when a certain user inputs the wrong credentials. Please advise on my concern below and thank you. See below:
0090308: LdapErr: DSID-0C09030B,
comment: AcceptSecurityContext error
Data 525, v893
HEX: 0×525 – user not found
DEC: 1317 – ERROR_NO_SUCH_USER (The specified account does not exist.)
+ System
– EventData
SupportInfo1 1
SupportInfo2 5012
ProcessingMode 0
ProcessingTimelnMilliseconds 1015
Errorcode 49
ErrorDescription Invalid Credentials
DCNam.
