Please advise on this. The GP Version is 18.3 and it should support Modern Authentication. MFA is not enabled for the email account. There is no "Application (Client) ID" entered in the "Company E-mail Setup" Window. When we try to send Customer Statements, it pops up "Exchange Log On" Window. We can enter password and continue to send email statements. However, does it mean it is still using Basic Authentication? Do we have to enter "Application (Client) ID" to enforce Modern Authentication even if we are not using MFA?