diff --git a/src/sql/workbench/services/connection/browser/connectionWidget.ts b/src/sql/workbench/services/connection/browser/connectionWidget.ts
index 240232eaa6..af5e6b27d8 100644
--- a/src/sql/workbench/services/connection/browser/connectionWidget.ts
+++ b/src/sql/workbench/services/connection/browser/connectionWidget.ts
@@ -646,6 +646,10 @@ export class ConnectionWidget extends lifecycle.Disposable {
 				// Populate tenants (select first by default for initialization of tenant dialog)
 				await this.onAzureAccountSelected(true);
 				this._azureTenantDropdown.enable();
+				// Populate username as 'email' of selected azure account in dropdown, as username is required,
+				// and email of Azure account selected applies as username in most cases.
+				this._userNameInputBox.value = this._azureAccountList.find(a => a.displayInfo.displayName === this._azureAccountDropdown.value)?.displayInfo.email!
+					?? this._azureAccountList[0]?.displayInfo?.email ?? '';
 			}).catch(err => this._logService.error(`Unexpected error populating Azure Account dropdown : ${err}`));
 			// Immediately show/hide appropriate elements though so user gets immediate feedback while we load accounts
 			this._tableContainer.classList.remove('hide-username');
@@ -757,6 +761,13 @@ export class ConnectionWidget extends lifecycle.Disposable {
 		if (!selectedAccount && selectFirstByDefault && this._azureAccountList.length > 0) {
 			selectedAccount = this._azureAccountList[0];
 		}
+
+		if (this.authenticationType === AuthenticationType.AzureMFAAndUser) {
+			// Populate username as 'email' of selected azure account in dropdown, as username is required,
+			// and email of Azure account selected applies as username in most cases.
+			this._userNameInputBox.value = selectedAccount?.displayInfo?.email! ?? '';
+		}
+
 		if (selectedAccount && selectedAccount.properties.tenants && selectedAccount.properties.tenants.length > 1) {
 			// There are multiple tenants available so let the user select one
 			let options = selectedAccount.properties.tenants.map(tenant => tenant.displayName);