Currently we are in process of converting to S4Hana with SUM DMO.
In phase PREP_CONFIGURATION/SUBMOD_MIG_CONFIG/HDB_MIG_CONFIG we have to enter input for Target DB Schema

Once we click next, immediately target S4hana application system R3trans -d is getting error as authentication error.
Updated hdbuserstore by executing hdbuserstore set DEFAULT <Hostname_FQDN>:<port> <schema-user> <password> but still no luck!!
Source System: ECC 6.0 EHP 8, MS SQL, Windows 2012 R2
Target : S4Hana 1909 Initial Shipment, Hana 2.0 SP04, SLES 15SP1
Can anyone suggest on this.
Regards,
Srinivas