Unable to change the default database on Linux Mint to MSSQL Server

I am trying to change the default database to MSSQL Server database but not able to establish the connection. It is getting failed with an error stating "Connestion failed for user"Administrator".Clientconnectionid:******". I have checked my credentials and tried different combinations as well ex. with domain and without domain. Nothing worked. Please let me know the solution to it. Thanks!