diff --git a/app/scodoc/sco_excel.py b/app/scodoc/sco_excel.py
index 9da67ec015..8d52669c55 100644
--- a/app/scodoc/sco_excel.py
+++ b/app/scodoc/sco_excel.py
@@ -280,8 +280,9 @@ class ScoExcelSheet:
             cell.alignment = style["alignment"]
         if not comment is None:
             cell.comment = Comment(comment, "scodoc")
-            cell.comment.width = 400
-            cell.comment.height = 150
+            lines = comment.splitlines()
+            cell.comment.width = 7 * max([len(line) for line in lines])
+            cell.comment.height = 20 * len(lines)
         return cell
 
     def make_row(self, values: list, style=None, comments=None):
diff --git a/app/scodoc/sco_import_users.py b/app/scodoc/sco_import_users.py
index 8ab1ae3901..a1e2f77ac9 100644
--- a/app/scodoc/sco_import_users.py
+++ b/app/scodoc/sco_import_users.py
@@ -142,25 +142,26 @@ def import_users(users, auth_dept=""):
         msg_list.append("Ligne %s : %s" % (line, msg))
 
     if len(users) == 0:
-        ok = False
+        import_ok = False
         msg_list = ["Feuilles vide ou illisible"]
     else:
         created = []  # liste de uid créés
         msg_list = []
         line = 1  # satr from excel line #2
-        ok = True
+        import_ok = True
         try:
             for u in users:
+                user_ok = True
                 line = line + 1
-                ok, msg = sco_users.check_modif_user(
+                user_ok, msg = sco_users.check_modif_user(
                     0,
                     user_name=u["user_name"],
                     nom=u["nom"],
                     prenom=u["prenom"],
                     email=u["email"],
-                    roles=u["roles"],
+                    roles=u["roles"].split(","),
                 )
-                if not ok:
+                if not user_ok:
                     append_msg("identifiant '%s' %s" % (u["user_name"], msg))
                     # raise ScoValueError(
                     #     "données invalides pour %s: %s" % (u["user_name"], msg)
@@ -169,52 +170,56 @@ def import_users(users, auth_dept=""):
                 #
                 # check identifiant
                 if not re.match(r"^[a-zA-Z0-9@\\\-_\\\.]*$", u["user_name"]):
-                    ok = False
+                    user_ok = False
                     append_msg(
                         "identifiant '%s' invalide (pas d'accents ni de caractères spéciaux)"
                         % u["user_name"]
                     )
                 elif len(u["user_name"]) > 64:
-                    ok = False
+                    user_ok = False
                     append_msg(
                         "identifiant '%s' trop long (64 caractères)" % u["user_name"]
                     )
                 if len(u["nom"]) > 64:
-                    ok = False
+                    user_ok = False
                     append_msg("nom '%s' trop long (64 caractères)" % u["nom"])
                 if len(u["prenom"]) > 64:
-                    ok = False
+                    user_ok = False
                     append_msg("prenom '%s' trop long (64 caractères)" % u["prenom"])
                 if len(u["email"]) > 120:
-                    ok = False
+                    user_ok = False
                     append_msg("email '%s' trop long (120 caractères)" % u["email"])
                 # check département
                 if u["dept"] != "":
                     dept = Departement.query.filter_by(acronym=u["dept"]).first()
                     if dept is None:
-                        ok = False
+                        user_ok = False
                         append_msg("département '%s' inexistant" % u["dept"])
                 for role in u["roles"].split(","):
                     try:
                         _, _ = UserRole.role_dept_from_string(role)
                     except ScoValueError as value_error:
-                        ok = False
+                        user_ok = False
                         append_msg("role : %s " % role)
                 # Création de l'utilisateur (via SQLAlchemy)
-                if ok:
-                    user = User()
-                    user.from_dict(u, new_user=True)
-                    db.session.add(user)
-                    created.append(u["user_name"])
-            db.session.commit()
+                if user_ok:
+                    created.append(u)
+                else:
+                    import_ok = False
         except ScoValueError as value_error:
             log("import_users: exception: abort create %s" % str(created))
-            db.session.rollback()
             raise ScoValueError(msg)  # re-raise exception
-
-        for user in users:
-            mail_password(user)
-    return ok, msg_list
+        if import_ok:
+            for u in created:
+                u["roles_string"] = u["roles"]
+                user = User()
+                user.from_dict(u, new_user=True)
+                db.session.add(user)
+                db.session.commit()
+                mail_password(u)
+        else:
+            created = []  # reset # of created users to 0
+    return import_ok, msg_list, len(created)
 
 
 #  --------- Génération du mot de passe initial -----------
diff --git a/app/views/users.py b/app/views/users.py
index 3cd5af136a..b025e870e7 100644
--- a/app/views/users.py
+++ b/app/views/users.py
@@ -469,7 +469,9 @@ def create_user_form(REQUEST, user_name=None, edit=0):
 def import_users_generate_excel_sample(REQUEST):
     "une feuille excel pour importation utilisateurs"
     data = sco_import_users.generate_excel_sample()
-    return sco_excel.send_excel_file(REQUEST, data, "ImportUtilisateurs.xlsx")
+    return sco_excel.send_excel_file(
+        REQUEST, data, "ImportUtilisateurs" + scu.XLSX_SUFFIX
+    )
 
 
 @bp.route("/import_users_form", methods=["GET", "POST"])
@@ -523,23 +525,18 @@ def import_users_form(REQUEST=None):
     if tf[0] == 0:
         return "\n".join(H) + tf[1] + "</li></ol>" + help + F
     elif tf[0] == -1:
-        return flask.redirect(url_for("scodoc.index"))
+        return flask.redirect(back_url)
     else:
         # IMPORT
-        ok, diag = sco_import_users.import_excel_file(tf[2]["xlsfile"])
-        H = [
-            html_sco_header.sco_header(page_title="Import utilisateurs"),
-            """<h2>Téléchargement d'une nouvelle liste d'utilisateurs</h2>
-        """,
-        ]
-        if diag:
-            H.append("""<h3>Problèmes rencontrés:</h3><ul>""")
-            for d in diag:
-                H.append(f"<li>{d}</li>")
-            H.append("</ul>")
+        ok, diag, nb_created = sco_import_users.import_excel_file(tf[2]["xlsfile"])
+        H = [html_sco_header.sco_header(page_title="Import utilisateurs")]
+        H.append("<ul>")
+        for d in diag:
+            H.append("<li>%s</li>" % d)
+        H.append("</ul>")
         if ok:
             dest = url_for("users.index_html", scodoc_dept=g.scodoc_dept)
-            H.append("<p>Ok, Import terminé !</p>")
+            H.append("<p>Ok, Import terminé (%s utilisateurs créés)!</p>" % nb_created)
             H.append('<p><a class="stdlink" href="%s">Continuer</a></p>' % dest)
         else:
             dest = url_for("users.import_users_form", scodoc_dept=g.scodoc_dept)