diff --git a/src/pages/TeachersUnite/IntroSchoolPrincipalPage.js b/src/pages/TeachersUnite/IntroSchoolPrincipalPage.js
index 25997fa9b307..a9dc8a2f4642 100644
--- a/src/pages/TeachersUnite/IntroSchoolPrincipalPage.js
+++ b/src/pages/TeachersUnite/IntroSchoolPrincipalPage.js
@@ -12,6 +12,7 @@ import Text from '@components/Text';
 import TextInput from '@components/TextInput';
 import useLocalize from '@hooks/useLocalize';
 import * as ErrorUtils from '@libs/ErrorUtils';
+import * as LoginUtils from '@libs/LoginUtils';
 import Navigation from '@libs/Navigation/Navigation';
 import * as ValidationUtils from '@libs/ValidationUtils';
 import styles from '@styles/styles';
@@ -74,6 +75,9 @@ function IntroSchoolPrincipalPage(props) {
             if (!_.isEmpty(values.partnerUserID) && !Str.isValidEmail(values.partnerUserID)) {
                 ErrorUtils.addErrorMessage(errors, 'partnerUserID', translate('teachersUnitePage.error.enterValidEmail'));
             }
+            if (!_.isEmpty(values.partnerUserID) && LoginUtils.isEmailPublicDomain(values.partnerUserID)) {
+                ErrorUtils.addErrorMessage(errors, 'partnerUserID', translate('teachersUnitePage.error.tryDifferentEmail'));
+            }
 
             return errors;
         },