[update] sanitized name for folder creation

models/res_partner.py

@@ -76,7 +76,7 @@ class AlfodooResPartner(models.Model):
                 if not partner.name.startswith(".")
                 else partner.name.replace(".", "_", 1)
             )
-            sanitized_name = backend.sanitize_cmis_name(folder_name)
+            sanitized_name = backend.sanitize_cmis_name(folder_name).replace("+", "_")
             name = backend.get_unique_folder_name(sanitized_name, root_folder)
             properties = partner._get_folder_properties(records, backend)
             partner.partner_cmis_folder = root_folder.createFolder(