Error: SQL Server – Error starting esri_sde service -93 DBMS error code: 18456

Whenever there is inconsistency with the password, the following error message is logged in the SDE error log after trying to start the ArcSDE service: IDBInitialize::Initialize Failed init_DB DB_instance_open_as_dba: -93 DBMS error code: 18456 Microsoft OLE DB Provider for SQL