diff --git a/app/tables/table_builder.py b/app/tables/table_builder.py
index dc0ef6cd..d7e01358 100644
--- a/app/tables/table_builder.py
+++ b/app/tables/table_builder.py
@@ -265,6 +265,8 @@ class Table(Element):
         title: str = None,
         classes: list[str] = None,
         raw_title: str = None,
+        no_excel: bool = False,
+        only_excel: bool = False,
     ) -> tuple["Cell", "Cell"]:
         """Record this title,
         and create cells for footer and header if they don't already exist.
@@ -282,6 +284,8 @@ class Table(Element):
                     classes=classes,
                     group=self.column_group.get(col_id),
                     raw_content=raw_title or title,
+                    no_excel=no_excel,
+                    only_excel=only_excel,
                 )
             if self.foot_title_row:
                 self.foot_title_row.cells[col_id] = self.foot_title_row.add_cell(
@@ -370,6 +374,7 @@ class Row(Element):
         target_attrs: dict = None,
         target: str = None,
         column_classes: set[str] = None,
+        only_excel: bool = False,
         no_excel: bool = False,
     ) -> "Cell":
         """Create cell and add it to the row.
@@ -397,6 +402,7 @@ class Row(Element):
             column_group=group,
             title=title,
             raw_title=raw_title,
+            only_excel=only_excel,
             no_excel=no_excel,
         )
 
@@ -406,6 +412,7 @@ class Row(Element):
         cell: "Cell",
         column_group: str | None = None,
         title: str | None = None,
+        only_excel: bool = False,
         no_excel: bool = False,
         raw_title: str | None = None,
     ) -> "Cell":
@@ -414,10 +421,10 @@ class Row(Element):
         """
         cell.data["group"] = column_group or ""
         self.cells[col_id] = cell
-        if col_id not in self.table.column_ids:
+        if not only_excel and col_id not in self.table.column_ids:
             self.table.column_ids.append(col_id)
-            if not no_excel:
-                self.table.raw_column_ids.append(col_id)
+        if not no_excel and col_id not in self.table.raw_column_ids:
+            self.table.raw_column_ids.append(col_id)
 
         self.table.insert_group(column_group)
         if column_group is not None:
@@ -425,7 +432,12 @@ class Row(Element):
 
         if title is not None:
             self.table.add_title(
-                col_id, title, classes=cell.classes, raw_title=raw_title
+                col_id,
+                title,
+                classes=cell.classes,
+                raw_title=raw_title,
+                no_excel=no_excel,
+                only_excel=only_excel,
             )
 
         return cell
diff --git a/app/tables/visu_assiduites.py b/app/tables/visu_assiduites.py
index 8c99f493..af3895e7 100644
--- a/app/tables/visu_assiduites.py
+++ b/app/tables/visu_assiduites.py
@@ -6,14 +6,15 @@
 
 """Liste simple d'étudiants
 """
-
+import datetime
 from flask import g, url_for
 from app import log
 from app.models import FormSemestre, Identite, Justificatif
 from app.tables import table_builder as tb
-import app.scodoc.sco_assiduites as scass
 from app.scodoc import sco_preferences
 from app.scodoc import sco_utils as scu
+import app.scodoc.sco_assiduites as scass
+from app.scodoc.sco_exceptions import ScoValueError
 
 
 class TableAssi(tb.Table):
@@ -39,7 +40,13 @@ class TableAssi(tb.Table):
     ):
         self.rows: list["RowAssi"] = []  # juste pour que VSCode nous aide sur .rows
         classes = ["gt_table"]
-        self.dates = [str(dates[0]) + "T00:00", str(dates[1]) + "T23:59"]
+        try:
+            self.dates = [
+                datetime.datetime.fromisoformat(str(dates[0]) + "T00:00"),
+                datetime.datetime.fromisoformat(str(dates[1]) + "T00:00"),
+            ]
+        except ValueError as exc:
+            raise ScoValueError("invalid dates") from exc
         self.formsemestre = formsemestre
         self.formsemestre_modimpls = formsemestre_modimpls
         if convert_values:
@@ -97,6 +104,20 @@ class RowAssi(tb.Row):
         bilan_etud = url_for(
             "assiduites.bilan_etud", scodoc_dept=g.scodoc_dept, etudid=etud.id
         )
+        self.add_cell(
+            "etudid",
+            "etudid",
+            etud.etudid,
+            "etudinfo",
+            only_excel=True,
+        )
+        self.add_cell(
+            "code_nip",
+            "code_nip",
+            etud.code_nip,
+            "etudinfo",
+            only_excel=True,
+        )
         self.add_cell(
             "nom_disp",
             "Nom",
diff --git a/app/views/assiduites.py b/app/views/assiduites.py
index 7ce10e55..bd9536a9 100644
--- a/app/views/assiduites.py
+++ b/app/views/assiduites.py
@@ -1440,7 +1440,6 @@ def visu_assi_group():
         formsemestre_modimpls=formsemestre_modimpls,
         convert_values=(fmt == "html"),
     )
-
     # Export en XLS
     if fmt.startswith("xls"):
         return scu.send_file(