diff --git a/addons/project/wizard/project_share_wizard.py b/addons/project/wizard/project_share_wizard.py
index 0b54ae1c307..635a87c45cb 100644
--- a/addons/project/wizard/project_share_wizard.py
+++ b/addons/project/wizard/project_share_wizard.py
@@ -28,12 +28,29 @@ class ProjectShareWizard(models.TransientModel):
 
     partner_ids = fields.Many2many(compute="_compute_partner_ids", readonly=False, store=True, required=False)
     line_ids = fields.One2many('project.share.wizard.line', 'project_share_id')
+    has_access_changed = fields.Boolean(compute='_compute_has_access_changed')
 
     @api.depends('line_ids.user_id')
     def _compute_partner_ids(self):
         for project_share_wizard in self:
             project_share_wizard.partner_ids |= project_share_wizard.line_ids.user_id.partner_id
 
+    @api.depends('line_ids.user_id', 'line_ids.access_mode')
+    def _compute_has_access_changed(self):
+        project_sharing_access_read = self.env['project.sharing.access'].search_read([('project_id', '=', self.res_id)], ['user_id', 'access_mode'])
+        project_sharing_access_dict = {res['user_id'][0]: res['access_mode'] for res in project_sharing_access_read}
+        for project_share in self:
+            if len(project_share.line_ids) != len(project_sharing_access_dict):
+                project_share.has_access_changed = True
+                continue
+            has_access_changed = False
+            for line in project_share.line_ids:
+                access_mode = project_sharing_access_dict.get(line.user_id.id)
+                if not access_mode or access_mode != line.access_mode:
+                    has_access_changed = True
+                    break
+            project_share.has_access_changed = has_access_changed
+
     def action_send_mail_and_confirm_access(self):
         if not self.partner_ids:
             raise UserError(_('Impossible to send email, no recipients are mentionned.'))
diff --git a/addons/project/wizard/project_share_wizard_views.xml b/addons/project/wizard/project_share_wizard_views.xml
index b3a6882ab94..ee8bdb230c6 100644
--- a/addons/project/wizard/project_share_wizard_views.xml
+++ b/addons/project/wizard/project_share_wizard_views.xml
@@ -27,9 +27,10 @@
                     </field>
                 </group>
                 <footer>
-                    <button string="Confirm Access" name="action_confirm_access" attrs="{'invisible': ['|', ('access_warning', '!=', ''), ('line_ids', '=', [])]}" type="object" class="btn-primary" data-hotkey="v"/>
-                    <button string="Send" name="action_send_mail" attrs="{'invisible': ['|', ('access_warning', '!=', ''), ('line_ids', '!=', [])]}" type="object" class="btn-primary" data-hotkey="q"/>
-                    <button string="Send &amp; Confirm" name="action_send_mail_and_confirm_access" attrs="{'invisible': ['|', ('access_warning', '!=', ''), ('line_ids', '=', [])]}" type="object" class="btn-primary" data-hotkey="q"/>
+                    <field name="has_access_changed" invisible="1" />
+                    <button string="Confirm Access" name="action_confirm_access" attrs="{'invisible': ['|', ('access_warning', '!=', ''), ('has_access_changed', '=', False)]}" type="object" class="btn-primary" data-hotkey="v"/>
+                    <button string="Send" name="action_send_mail" attrs="{'invisible': ['|', ('access_warning', '!=', ''), ('has_access_changed', '=', True)]}" type="object" class="btn-primary" data-hotkey="q"/>
+                    <button string="Send &amp; Confirm" name="action_send_mail_and_confirm_access" attrs="{'invisible': ['|', ('access_warning', '!=', ''), ('has_access_changed', '=', False)]}" type="object" class="btn-primary" data-hotkey="q"/>
                     <button string="Cancel" class="btn-default" special="cancel" data-hotkey="z" />
                 </footer>
             </form>