diff --git a/app/scodoc/TrivialFormulator.py b/app/scodoc/TrivialFormulator.py
index ae7007683b..5b7020a8fe 100644
--- a/app/scodoc/TrivialFormulator.py
+++ b/app/scodoc/TrivialFormulator.py
@@ -730,11 +730,7 @@ var {field}_as = new bsn.AutoSuggest('{field}', {field}_opts);
             R.append("%s</td>" % title)
             R.append('<td class="tf-ro-field%s">' % klass)
 
-        if (
-            input_type == "text"
-            or input_type == "text_suggest"
-            or input_type == "color"
-        ):
+        if input_type in ("text", "text_suggest", "color", "datedmy"):
             R.append(("%(" + field + ")s") % self.values)
         elif input_type in ("radio", "menu", "checkbox", "boolcheckbox"):
             if input_type == "boolcheckbox":
diff --git a/app/scodoc/sco_exceptions.py b/app/scodoc/sco_exceptions.py
index 2537509972..967b26f714 100644
--- a/app/scodoc/sco_exceptions.py
+++ b/app/scodoc/sco_exceptions.py
@@ -47,6 +47,15 @@ class ScoValueError(ScoException):
         self.dest_url = dest_url
 
 
+class ScoPermissionDenied(ScoValueError):
+    """Permission non accordée (appli web)"""
+
+    def __init__(self, msg=None, dest_url=None):
+        if msg is None:
+            msg = "Opération non autorisée !"
+        super().__init__(msg, dest_url=dest_url)
+
+
 class ScoBugCatcher(ScoException):
     "bug avec enquete en cours"
 
diff --git a/app/scodoc/sco_permissions.py b/app/scodoc/sco_permissions.py
index 5e1bd8c4dd..07d606e878 100644
--- a/app/scodoc/sco_permissions.py
+++ b/app/scodoc/sco_permissions.py
@@ -15,8 +15,8 @@ _SCO_PERMISSIONS = (
     (1 << 2, "ScoView", "Voir"),
     (1 << 3, "ScoEnsView", "Voir les parties pour les enseignants"),
     (1 << 4, "ScoObservateur", "Observer (accès lecture restreint aux bulletins)"),
-    (1 << 5, "ScoUsersAdmin", "Gérer les utilisateurs"),
-    (1 << 6, "ScoUsersView", "Voir les utilisateurs"),
+    (1 << 5, "ScoUsersAdmin", "Gérer les utilisateurs (de son département)"),
+    (1 << 6, "ScoUsersView", "Voir les utilisateurs (de tous les dépts)"),
     (1 << 7, "ScoChangePreferences", "Modifier les préférences"),
     (1 << 8, "ScoChangeFormation", "Changer les formations"),
     (1 << 9, "ScoEditFormationTags", "Tagguer les formations"),
diff --git a/app/templates/auth/user_info_page.html b/app/templates/auth/user_info_page.html
index f344fb1153..1c2223294f 100644
--- a/app/templates/auth/user_info_page.html
+++ b/app/templates/auth/user_info_page.html
@@ -18,23 +18,33 @@
     {{user.date_expiration.isoformat() if user.date_expiration else "(sans limite)"}}
 <p>
 <ul>
+    {% if (
+        current_user.is_administrator()
+        or current_user.has_permission(Permission.ScoUsersAdmin, user.dept)
+    ) %}
     <li><a class="stdlink" href="{{
         url_for( 'users.form_change_password', 
         scodoc_dept=g.scodoc_dept, user_name=user.user_name)
         }}">modifier le mot de passe ou l'adresse mail</a>
     </li>
+    {% endif %}
     {% if current_user.has_permission(Permission.ScoUsersAdmin, dept) %}
     <li><a class="stdlink" href="{{
             url_for('users.create_user_form', scodoc_dept=g.scodoc_dept, 
             user_name=user.user_name, edit=1)
-        }}">modifier ce compte</a>
-    </li>
-    <li><a class="stdlink" href="{{
-            url_for('users.toggle_active_user', scodoc_dept=g.scodoc_dept, 
-            user_name=user.user_name)
-        }}">{{"désactiver" if user.active else "activer"}} ce compte</a>
+        }}">modifier ce compte et ses rôles</a>
     </li>
     {% endif %}
+    {% if (
+        current_user.is_administrator()
+        or current_user.has_permission(Permission.ScoUsersAdmin, user.dept)
+    ) %}
+        <li><a class="stdlink" href="{{
+                url_for('users.toggle_active_user', scodoc_dept=g.scodoc_dept, 
+                user_name=user.user_name)
+            }}">{{"désactiver" if user.active else "activer"}} ce compte</a>
+        </li>
+    {% endif %}
 </ul>
 
 {% if current_user.id == user.id %}
@@ -45,7 +55,7 @@
 
 {# Liste des permissions #}
 <div class="permissions">
-    <p>Permissions de cet utilisateur dans le département {{dept}}:</p>
+    <p><b>Permissions de cet utilisateur dans le département {{dept}}:</b></p>
     <ul>
         {% for p in Permission.description %}
         <li>{{Permission.description[p]}} :
diff --git a/app/views/users.py b/app/views/users.py
index 315601bbd1..b95c75912c 100644
--- a/app/views/users.py
+++ b/app/views/users.py
@@ -68,7 +68,7 @@ from app.scodoc import sco_users
 from app.scodoc import sco_utils as scu
 from app.scodoc import sco_xml
 from app import log
-from app.scodoc.sco_exceptions import AccessDenied, ScoValueError
+from app.scodoc.sco_exceptions import AccessDenied, ScoPermissionDenied, ScoValueError
 from app.scodoc.sco_import_users import generate_password
 from app.scodoc.sco_permissions_check import can_handle_passwd
 from app.scodoc.TrivialFormulator import TrivialFormulator, tf_error_message
@@ -141,11 +141,71 @@ def index_html(all_depts=False, with_inactives=False, format="html"):
     )
 
 
+def _get_administrable_depts() -> list[str]:
+    """Liste des acronymes des départements dans lesquels l'utilisateur
+    courant peut administrer des utilisateurs.
+    Si SuperAdmin, tous les départements
+    Sinon, les départements dans lesquels l'utilisateur a la permission ScoUsersAdmin
+    """
+    #
+    if current_user.is_administrator():
+        log(f"create_user_form called by {current_user.user_name} (super admin)")
+        administrable_dept_acronyms = sorted(
+            [d.acronym for d in Departement.query.all()]
+        )
+    else:
+        administrable_dept_acronyms = current_user.get_depts_with_permission(
+            Permission.ScoUsersAdmin
+        )
+        if None in administrable_dept_acronyms:
+            administrable_dept_acronyms = sorted(
+                [d.acronym for d in Departement.query.all()]
+            )
+
+    return administrable_dept_acronyms
+
+
+def _get_editable_roles(
+    administrable_dept_acronyms: list = None, all_roles=True
+) -> set[tuple[Role, str]]:
+    """Rôles modifiables: ensemble de tuples (role, dept_acronym)
+    (où dept_acronym est None si tous dept.)
+
+    Si all_roles, tous les rôles définis et modifiables par l'utilisateurs.
+    Sinon, seulement les rôles "standards" de ScoDoc.
+    """
+    if all_roles:
+        # tous sauf SuperAdmin
+        roles = [
+            r
+            for r in Role.query.all()
+            if r.permissions != Permission.ALL_PERMISSIONS[0]
+        ]
+    else:
+        # Les rôles standards créés à l'initialisation de ScoDoc:
+        roles = [
+            Role.get_named_role(r) for r in sco_roles_default.ROLES_ATTRIBUABLES_DEPT
+        ]
+
+    # Génère toutes les combinaisons roles/départements
+    editable_roles_set = {
+        (r, dept) for r in roles for dept in administrable_dept_acronyms
+    }
+    if current_user.is_administrator():
+        editable_roles_set |= {
+            (Role.get_named_role(r), None)
+            for r in sco_roles_default.ROLES_ATTRIBUABLES_SCODOC
+        }
+        # Un super-admin peut nommer d'autres super-admin:
+        editable_roles_set |= {(Role.get_named_role("SuperAdmin"), None)}
+    return editable_roles_set
+
+
 @bp.route("/create_user_form", methods=["GET", "POST"])
 @scodoc
 @permission_required(Permission.ScoUsersAdmin)
 @scodoc7func
-def create_user_form(user_name=None, edit=0, all_roles=False):
+def create_user_form(user_name=None, edit=0, all_roles=True):
     "form. création ou édition utilisateur"
     if user_name is not None:  # scodoc7func converti en int !
         user_name = str(user_name)
@@ -162,6 +222,7 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
         )
     ]
     F = html_sco_header.sco_footer()
+    the_user: User = None
     if edit:
         if not user_name:
             raise ValueError("missing argument: user_name")
@@ -170,60 +231,6 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
             raise ScoValueError("utilisateur inexistant")
         initvalues = the_user.to_dict()
         H.append(f"<h2>Modification de l'utilisateur {user_name}</h2>")
-    else:
-        H.append("<h2>Création d'un utilisateur</h2>")
-
-    is_super_admin = False
-    if current_user.has_permission(Permission.ScoSuperAdmin, g.scodoc_dept):
-        H.append("""<p class="warning">Vous êtes super administrateur !</p>""")
-        is_super_admin = True
-
-    if all_roles:
-        # tous sauf SuperAdmin
-        standard_roles = [
-            r
-            for r in Role.query.all()
-            if r.permissions != Permission.ALL_PERMISSIONS[0]
-        ]
-    else:
-        # Les rôles standards créés à l'initialisation de ScoDoc:
-        standard_roles = [
-            Role.get_named_role(r) for r in sco_roles_default.ROLES_ATTRIBUABLES_DEPT
-        ]
-    # Départements auxquels ont peut associer des rôles via ce dialogue:
-    #    si  SuperAdmin, tous les rôles standards dans tous les départements
-    #    sinon, les départements dans lesquels l'utilisateur a la permission ScoUsersAdmin
-    if is_super_admin:
-        log(f"create_user_form called by {current_user.user_name} (super admin)")
-        administrable_dept_acronyms = [d.acronym for d in Departement.query.all()]
-    else:
-        # Si on n'est pas SuperAdmin, liste les départements dans lesquels on a la
-        # permission ScoUsersAdmin
-        administrable_dept_acronyms = sorted(
-            set(
-                [
-                    x.dept or ""
-                    for x in UserRole.query.filter_by(user=current_user)
-                    if x.role.has_permission(Permission.ScoUsersAdmin) and x.dept
-                ]
-            )
-        )
-
-    editable_roles_set = {
-        (r, dept) for r in standard_roles for dept in administrable_dept_acronyms
-    }
-    if current_user.is_administrator():
-        editable_roles_set |= {
-            (Role.get_named_role(r), None)
-            for r in sco_roles_default.ROLES_ATTRIBUABLES_SCODOC
-        }
-        # Un super-admin peut nommer d'autres super-admin:
-        editable_roles_set |= {(Role.get_named_role("SuperAdmin"), None)}
-    #
-    if not edit:
-        submitlabel = "Créer utilisateur"
-        orig_roles = set()
-    else:
         submitlabel = "Modifier utilisateur"
         if "roles_string" in initvalues:
             initvalues["roles"] = initvalues["roles_string"].split(",")
@@ -243,6 +250,26 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
         }
         if not initvalues["active"]:
             editable_roles_set = set()  # can't change roles of a disabled user
+    else:
+        H.append("<h2>Création d'un utilisateur</h2>")
+        submitlabel = "Créer utilisateur"
+        orig_roles = set()
+
+    is_super_admin = current_user.is_administrator()
+    if is_super_admin:
+        H.append("""<p class="warning">Vous êtes super administrateur !</p>""")
+
+    administrable_dept_acronyms = _get_administrable_depts()
+    if edit:
+        if the_user.dept is None:  # seul le super admin peut le toucher
+            edit_only_roles = not current_user.is_administrator()
+        else:
+            edit_only_roles = the_user.dept not in administrable_dept_acronyms
+    else:
+        edit_only_roles = False  # création nouvel utilisateur
+    editable_roles_set = _get_editable_roles(
+        administrable_dept_acronyms, all_roles=all_roles
+    )
     editable_roles_strings = {
         r.name + "_" + (dept or "") for (r, dept) in editable_roles_set
     }
@@ -265,12 +292,29 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
     for i, role_string in enumerate(displayed_roles_strings):
         if role_string not in editable_roles_strings:
             disabled_roles[i] = True
+    # Formulaire:
     descr = [
         ("edit", {"input_type": "hidden", "default": edit}),
-        ("nom", {"title": "Nom", "size": 20, "allow_null": False}),
-        ("prenom", {"title": "Prénom", "size": 20, "allow_null": False}),
+        (
+            "nom",
+            {
+                "title": "Nom",
+                "size": 20,
+                "allow_null": False,
+                "readonly": edit_only_roles,
+            },
+        ),
+        (
+            "prenom",
+            {
+                "title": "Prénom",
+                "size": 20,
+                "allow_null": False,
+                "readonly": edit_only_roles,
+            },
+        ),
     ]
-    if current_user.user_name != user_name:
+    if current_user.user_name != user_name and not edit_only_roles:
         # no one can change its own status
         descr.append(
             (
@@ -316,13 +360,12 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
                 },
             ),
         ]
-    else:
+    else:  # edition: on ne peut pas changer user_name
         descr += [
             (
                 "user_name",
                 {"input_type": "hidden", "default": initvalues["user_name"]},
-            ),
-            ("user_name", {"input_type": "hidden", "default": initvalues["user_name"]}),
+            )
         ]
     descr += [
         (
@@ -330,9 +373,12 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
             {
                 "title": "e-mail",
                 "input_type": "text",
-                "explanation": "requis, doit fonctionner",
+                "explanation": "requis, doit fonctionner"
+                if not edit_only_roles
+                else "",
                 "size": 20,
                 "allow_null": False,
+                "readonly": edit_only_roles,
             },
         )
     ]
@@ -362,72 +408,50 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
                 },
             ),
         ]
-    # Si auth n'a pas de departement (admin global)
-    # propose de choisir librement le dept du nouvel utilisateur
-    # sinon, menu proposant l'ensembe des départements dans lesquels
-    # nous avons la permission ScoUserAdmin + le dept actuel de l'utilisateur
-    # modifié.
-    if not auth_dept:
+    # Si SuperAdmin, propose de choisir librement le dept du nouvel utilisateur
+    selectable_dept_acronyms = set(administrable_dept_acronyms)
+    if edit and the_user.dept is not None:  # ajoute dept actuel de l'utilisateur
+        selectable_dept_acronyms |= {the_user.dept}
+    if is_super_admin and len(selectable_dept_acronyms) > 1:
+        selectable_dept_acronyms = sorted(list(selectable_dept_acronyms))
         descr.append(
             (
                 "dept",
                 {
                     "title": "Département",
-                    "input_type": "text",
-                    "size": 12,
-                    "allow_null": True,
-                    "explanation": """département de rattachement de l'utilisateur
-                    (s'il s'agit d'un administrateur, laisser vide si vous voulez 
-                    qu'il puisse créer des utilisateurs dans d'autres départements)
-                    """,
+                    "input_type": "menu",
+                    "explanation": """département de rattachement de l'utilisateur""",
+                    "labels": selectable_dept_acronyms,
+                    "allowed_values": selectable_dept_acronyms,
+                    "default": g.scodoc_dept
+                    if g.scodoc_dept in selectable_dept_acronyms
+                    else (auth_dept or ""),
                 },
             )
         )
         can_choose_dept = True
-    else:
-        selectable_dept_acronyms = set(administrable_dept_acronyms)
-        if edit and the_user.dept is not None:  # ajoute dept actuel de l'utilisateur
-            selectable_dept_acronyms |= {the_user.dept}
-        if len(selectable_dept_acronyms) > 1:
-            can_choose_dept = True
-            selectable_dept_acronyms = sorted(list(selectable_dept_acronyms))
+    else:  # pas de choix de département
+        can_choose_dept = False
+        if edit:
             descr.append(
                 (
-                    "dept",
+                    "d",
                     {
-                        "title": "Département",
-                        "input_type": "menu",
-                        "explanation": """département de rattachement de l'utilisateur""",
-                        "labels": selectable_dept_acronyms,
-                        "allowed_values": selectable_dept_acronyms,
-                        "default": g.scodoc_dept
-                        if g.scodoc_dept in selectable_dept_acronyms
-                        else "",
+                        "input_type": "separator",
+                        "title": f"""L'utilisateur appartient au département {the_user.dept or "(tous)"}""",
                     },
                 )
             )
-        else:  # pas de choix de département
-            can_choose_dept = False
-            if edit:
-                descr.append(
-                    (
-                        "d",
-                        {
-                            "input_type": "separator",
-                            "title": f"L'utilisateur appartient au département {auth_dept}",
-                        },
-                    )
-                )
-            else:
-                descr.append(
-                    (
-                        "d",
-                        {
-                            "input_type": "separator",
-                            "title": f"L'utilisateur  sera crée dans le département {auth_dept}",
-                        },
-                    )
+        else:
+            descr.append(
+                (
+                    "d",
+                    {
+                        "input_type": "separator",
+                        "title": f"L'utilisateur  sera crée dans le département {auth_dept}",
+                    },
                 )
+            )
 
     descr += [
         (
@@ -435,9 +459,12 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
             {
                 "title": "Date d'expiration",  # j/m/a
                 "input_type": "datedmy",
-                "explanation": "j/m/a, laisser vide si pas de limite",
+                "explanation": "j/m/a, laisser vide si pas de limite"
+                if not edit_only_roles
+                else "",
                 "size": 9,
                 "allow_null": True,
+                "readonly": edit_only_roles,
             },
         ),
         (
@@ -451,17 +478,20 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
                 "disabled_items": disabled_roles,
             },
         ),
-        (
-            "force",
-            {
-                "title": "Ignorer les avertissements",
-                "input_type": "checkbox",
-                "explanation": "passer outre les avertissements (homonymes, etc)",
-                "labels": ("",),
-                "allowed_values": ("1",),
-            },
-        ),
     ]
+    if not edit_only_roles:
+        descr += [
+            (
+                "force",
+                {
+                    "title": "Ignorer les avertissements",
+                    "input_type": "checkbox",
+                    "explanation": "passer outre les avertissements (homonymes, etc)",
+                    "labels": ("",),
+                    "allowed_values": ("1",),
+                },
+            ),
+        ]
     vals = scu.get_request_args()
     if "tf_submitted" in vals and "roles" not in vals:
         vals["roles"] = []
@@ -491,7 +521,7 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
         else:
             edit = 0
         try:
-            force = int(vals["force"][0])
+            force = int(vals.get("force", "0")[0])
         except (IndexError, ValueError, TypeError):
             force = 0
 
@@ -511,35 +541,37 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
         if err:
             H.append(tf_error_message(f"""Erreur: {err}"""))
             return "\n".join(H) + "\n" + tf[1] + F
-        ok, msg = sco_users.check_modif_user(
-            edit,
-            enforce_optionals=not force,
-            user_name=user_name,
-            nom=vals["nom"],
-            prenom=vals["prenom"],
-            email=vals["email"],
-            dept=vals.get("dept", auth_dept),
-            roles=vals["roles"],
-        )
-        if not ok:
-            H.append(tf_error_message(msg))
-            return "\n".join(H) + "\n" + tf[1] + F
 
-        if "date_expiration" in vals:
-            try:
-                if vals["date_expiration"]:
-                    vals["date_expiration"] = datetime.datetime.strptime(
-                        vals["date_expiration"], "%d/%m/%Y"
-                    )
-                    if vals["date_expiration"] < datetime.datetime.now():
-                        H.append(tf_error_message("date expiration passée"))
-                        return "\n".join(H) + "\n" + tf[1] + F
-                else:
-                    vals["date_expiration"] = None
-            except ValueError:
-                H.append(tf_error_message("date expiration invalide"))
+        if not edit_only_roles:
+            ok_modif, msg = sco_users.check_modif_user(
+                edit,
+                enforce_optionals=not force,
+                user_name=user_name,
+                nom=vals["nom"],
+                prenom=vals["prenom"],
+                email=vals["email"],
+                dept=vals.get("dept", auth_dept),
+                roles=vals["roles"],
+            )
+            if not ok_modif:
+                H.append(tf_error_message(msg))
                 return "\n".join(H) + "\n" + tf[1] + F
 
+            if "date_expiration" in vals:
+                try:
+                    if vals["date_expiration"]:
+                        vals["date_expiration"] = datetime.datetime.strptime(
+                            vals["date_expiration"], "%d/%m/%Y"
+                        )
+                        if vals["date_expiration"] < datetime.datetime.now():
+                            H.append(tf_error_message("date expiration passée"))
+                            return "\n".join(H) + "\n" + tf[1] + F
+                    else:
+                        vals["date_expiration"] = None
+                except ValueError:
+                    H.append(tf_error_message("date expiration invalide"))
+                    return "\n".join(H) + "\n" + tf[1] + F
+
         if edit:  # modif utilisateur (mais pas password ni user_name !)
             if (not can_choose_dept) and "dept" in vals:
                 del vals["dept"]
@@ -566,11 +598,14 @@ def create_user_form(user_name=None, edit=0, all_roles=False):
             vals["roles_string"] = ",".join(roles)
 
             # ok, edit
-            log(f"sco_users: editing {user_name} by {current_user.user_name}")
-            log(f"sco_users: previous_values={initvalues}")
-            log(f"sco_users: new_values={vals}")
-            sco_users.user_edit(user_name, vals)
-            flash(f"Utilisateur {user_name} modifié")
+            if not edit_only_roles:
+                log(f"sco_users: editing {user_name} by {current_user.user_name}")
+                log(f"sco_users: previous_values={initvalues}")
+                log(f"sco_users: new_values={vals}")
+                sco_users.user_edit(user_name, vals)
+                flash(f"Utilisateur {user_name} modifié")
+            else:
+                sco_users.user_edit(user_name, {"roles_string": vals["roles_string"]})
             return flask.redirect(
                 url_for(
                     "users.user_info_page",
@@ -946,14 +981,19 @@ def toggle_active_user(user_name: str = None):
     """Change active status of a user account"""
     if user_name is not None:  # scodoc7func converti en int !
         user_name = str(user_name)
+
     u = User.query.filter_by(user_name=user_name).first()
     if not u:
         raise ScoValueError("invalid user_name")
+    # permission check:
+    if not (
+        current_user.is_administrator()
+        or current_user.has_permission(Permission.ScoUsersAdmin, u.dept)
+    ):
+        raise ScoPermissionDenied()
     form = DeactivateUserForm()
-    if (
-        request.method == "POST" and form.cancel.data
-    ):  # if cancel button is clicked, the form.cancel.data will be True
-        # flash
+    if request.method == "POST" and form.cancel.data:
+        # if cancel button is clicked, the form.cancel.data will be True
         return redirect(url_for("users.index_html", scodoc_dept=g.scodoc_dept))
     if form.validate_on_submit():
         u.active = not u.active