The error simply says that BIND authentication successful but it does not have to write access to the database you are trying to modify. The error below was prompted as a result of insufficient privilege as you can see from the error log.
System.DirectoryServices.Protocols.DirectoryOperationException: The user has insufficient access rights. at System.DirectoryServices.Protocols.LdapConnection.ConstructResponse(Int32 messageId, LdapOperation operation, ResultAll resultType, TimeSpan requestTimeOut, Boolean exceptionOnTimeOut)at system.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request, TimeSpan requestTimeout)
atPleasant.Identity.DirectoryServices.Ldap.LdapDirectoryConnection1.SetPassword(DirectoryUser directoryUser, String originalPassword, String newPassword) 2xxx-xx-1x xx:59:0x.xxxx***.DirectoryServices.Ldap.LdapDirectoryConnection1 Response Code: 50, Modify response details:00000005: SecErr:D*,problem 4003(INSUFF_ACCESS_RIGHTS),data0
Solution: Assign enough permissions to the service account or user account as the case may be
links
– https://www-01.ibm.com/support/docview.wss?uid=swg21214189
– https://info.pleasantsolutions.com/index.php?title=Documentation/Pleasant_Password_Server/J._User_Administration/Reset_Users/Self-Service_Password_Reset_Enrollment_(Enterprise%2b_and_Reset_Server)