diff --git a/corehq/apps/case_importer/static/case_importer/js/excel_fields.js b/corehq/apps/case_importer/static/case_importer/js/excel_fields.js
index 9d5f7f1e1605..dd821f3206a6 100644
--- a/corehq/apps/case_importer/static/case_importer/js/excel_fields.js
+++ b/corehq/apps/case_importer/static/case_importer/js/excel_fields.js
@@ -10,7 +10,8 @@ hqDefine('case_importer/js/excel_fields', [
     _,
     levenshtein
 ) {
-    function excelFieldRows(excelFields, caseFieldSpecs) {
+    function excelFieldRows(excelFields, caseFieldSpecs, systemFields) {
+        systemFields = _(systemFields);
         var self = {
             excelFields: excelFields,
             caseFieldSpecs: caseFieldSpecs,
@@ -30,6 +31,9 @@ hqDefine('case_importer/js/excel_fields', [
                 customCaseField: ko.observable(excelField),
                 isCustom: ko.observable(false),
             };
+            row.hasValue = ko.computed(function () {
+                return row.isCustom() || row.selectedCaseField();
+            });
             row.selectedCaseFieldOrBlank = ko.computed({
                 read: function () {
                     return row.isCustom() ? '' : row.selectedCaseField();
@@ -63,12 +67,6 @@ hqDefine('case_importer/js/excel_fields', [
             row.valuesHints = ko.computed(function () {
                 return row.caseFieldSpec().values_hints || [];
             });
-            row.createNewChecked = ko.computed({
-                read: function () {
-                    return _.isEmpty(row.caseFieldSpec());
-                },
-                write: row.isCustom,
-            });
             row.isDeprecated = ko.computed(function () {
                 return row.caseFieldSpec().deprecated === true;
             });
@@ -81,7 +79,7 @@ hqDefine('case_importer/js/excel_fields', [
                     row.isCustom(false);
                     row.selectedCaseField(field);
                 } else {
-                    row.isCustom(true);
+                    row.isCustom(!systemFields.contains(field));
                     row.selectedCaseField(null);
                 }
             };
@@ -102,6 +100,9 @@ hqDefine('case_importer/js/excel_fields', [
                 });
                 return _.chain(suggestions).sortBy('distance').pluck('field').value();
             });
+            row.isSystemProperty = ko.computed(function () {
+                return row.isCustom() && systemFields.contains(row.customCaseField());
+            });
 
             self.mappingRows.push(row);
         };
diff --git a/corehq/apps/case_importer/static/case_importer/js/main.js b/corehq/apps/case_importer/static/case_importer/js/main.js
index c8c903761f8c..3576e748cff1 100644
--- a/corehq/apps/case_importer/static/case_importer/js/main.js
+++ b/corehq/apps/case_importer/static/case_importer/js/main.js
@@ -61,6 +61,7 @@ hqDefine("case_importer/js/main", [
     var behaviorForExcelMappingPage = function () {
         var excelFields = initialPageData.get('excel_fields');
         var caseFieldSpecs = initialPageData.get('case_field_specs');
+        var systemFields = initialPageData.get('system_fields');
         if (!excelFields && !caseFieldSpecs) {
             // We're not on the excel mapping page
             return;
@@ -78,7 +79,7 @@ hqDefine("case_importer/js/main", [
             return;
         }
 
-        var excelFieldRows = excelFieldsModule.excelFieldRowsModel(excelFields, caseFieldSpecs);
+        var excelFieldRows = excelFieldsModule.excelFieldRowsModel(excelFields, caseFieldSpecs, systemFields);
         $('#excel-field-rows').koApplyBindings(excelFieldRows);
 
         $('#js-add-mapping').click(function (e) {
diff --git a/corehq/apps/case_importer/suggested_fields.py b/corehq/apps/case_importer/suggested_fields.py
index 7db372bec54f..5b8c3c8c6032 100644
--- a/corehq/apps/case_importer/suggested_fields.py
+++ b/corehq/apps/case_importer/suggested_fields.py
@@ -9,6 +9,7 @@
 )
 from corehq.apps.case_importer.util import RESERVED_FIELDS
 from corehq.apps.data_dictionary.util import get_values_hints_dict, get_deprecated_fields
+from corehq.apps.export.system_properties import MAIN_CASE_TABLE_PROPERTIES
 from corehq.toggles import BULK_UPLOAD_DATE_OPENED
 
 
@@ -115,3 +116,8 @@ def get_special_fields(domain=None):
             )
         )
     return special_fields
+
+
+def get_non_discoverable_system_properties():
+    discoverable = {s.field for s in get_special_fields() if s.description and s.discoverable}
+    return [p.label for p in MAIN_CASE_TABLE_PROPERTIES if p.label not in discoverable]
diff --git a/corehq/apps/case_importer/templates/case_importer/excel_config.html b/corehq/apps/case_importer/templates/case_importer/excel_config.html
index 5e4246d928b5..8fee156c1731 100644
--- a/corehq/apps/case_importer/templates/case_importer/excel_config.html
+++ b/corehq/apps/case_importer/templates/case_importer/excel_config.html
@@ -84,7 +84,7 @@
         <div class="col-md-6">
           <select class="form-control hqwebapp-select2" name="search_column" id="search_column" {% if is_bulk_import %}disabled="disabled"{% endif %}>
             {% for column in columns %}
-              <option value="{{column|escape}}">
+              <option value="{{column|escape}}" {% if column == "caseid" %}selected{% endif %}>
                 {{column|escape}}
               </option>
             {% endfor %}
diff --git a/corehq/apps/case_importer/templates/case_importer/excel_fields.html b/corehq/apps/case_importer/templates/case_importer/excel_fields.html
index f8caf4bd0d7a..7ecd2538eb03 100644
--- a/corehq/apps/case_importer/templates/case_importer/excel_fields.html
+++ b/corehq/apps/case_importer/templates/case_importer/excel_fields.html
@@ -21,6 +21,7 @@
 
   {% initial_page_data 'excel_fields' excel_fields %}
   {% initial_page_data 'case_field_specs' case_field_specs %}
+  {% initial_page_data 'system_fields' system_fields %}
   {% initial_page_data 'is_bulk_import' is_bulk_import %}
 
   <form action="{% url "excel_commit" domain %}"
diff --git a/corehq/apps/case_importer/templates/case_importer/partials/excel_field_rows.html b/corehq/apps/case_importer/templates/case_importer/partials/excel_field_rows.html
index 4f7f05538c68..96289e7c9b71 100644
--- a/corehq/apps/case_importer/templates/case_importer/partials/excel_field_rows.html
+++ b/corehq/apps/case_importer/templates/case_importer/partials/excel_field_rows.html
@@ -18,7 +18,7 @@
   </td>
 
   <td class="text-center">
-    <i class="fa fa-arrow-right"></i>
+    <!-- ko if: hasValue --><i class="fa fa-arrow-right"></i><!--/ko-->
   </td>
 
   <td class="col-md-3">
@@ -58,17 +58,27 @@
         </p>
     </div>
     <!--ko if: caseFieldSuggestions().length-->
-      <p class="help-block text-warning">
+      <p class="help-block text-info">
         <i class="fa fa-question-circle"></i>
         {% blocktrans with '<!--ko foreach: caseFieldSuggestions--><!--ko if: $index() !== 0-->, <!--/ko--><strong data-bind="text: $data"></strong><!--/ko-->' as suggestion %}
           Did you mean "{{ suggestion }}" instead?
         {% endblocktrans %}
       </p>
     <!--/ko-->
+    <!--ko if: isSystemProperty-->
+      <p class="help-block text-warning">
+        <i class="fa fa-question-circle"></i>
+        {% blocktrans %}
+          Importing a system property may have unexpected results such as
+          adding a duplicate field to case exports. Consider using a
+          different property name.
+        {% endblocktrans %}
+      </p>
+    <!--/ko-->
   </td>
 
   <td>
-    <input type="checkbox" class="form-check-input mt-2" class="new_property" data-bind="checked: createNewChecked"/>
+    <input type="checkbox" class="form-check-input mt-2" class="new_property" data-bind="checked: isCustom"/>
   </td>
 
   {% if request|toggle_enabled:"CASE_IMPORT_DATA_DICTIONARY_VALIDATION" %}
diff --git a/corehq/apps/case_importer/tests/test_suggested_fields.py b/corehq/apps/case_importer/tests/test_suggested_fields.py
index 0c5c652acdce..a493f1a8319c 100644
--- a/corehq/apps/case_importer/tests/test_suggested_fields.py
+++ b/corehq/apps/case_importer/tests/test_suggested_fields.py
@@ -6,6 +6,7 @@
 from corehq.apps.case_importer.suggested_fields import (
     FieldSpec,
     get_suggested_case_fields,
+    get_non_discoverable_system_properties,
 )
 from corehq.util.test_utils import DocTestMixin
 
@@ -68,3 +69,26 @@ def test_basic_inclusion_and_sorting(self):
                 FieldSpec(field='weight', show_in_menu=True),
             ]
         )
+
+
+class TestSystemProperties(SimpleTestCase):
+
+    def test_get_non_discoverable_system_properties(self):
+        self.assertEqual(get_non_discoverable_system_properties(), [
+            'number',
+            'caseid',
+            'case_type',
+            'closed',
+            'closed_by_user_id',
+            'closed_by_username',
+            'closed_date',
+            'last_modified_by_user_id',
+            'last_modified_by_user_username',
+            'last_modified_date',
+            'opened_by_user_id',
+            'opened_by_username',
+            'opened_date',
+            'server_last_modified_date',
+            'state',
+            'case_link',
+        ])
diff --git a/corehq/apps/case_importer/views.py b/corehq/apps/case_importer/views.py
index 635369125901..66760512d2b2 100644
--- a/corehq/apps/case_importer/views.py
+++ b/corehq/apps/case_importer/views.py
@@ -32,6 +32,7 @@
 )
 from corehq.apps.case_importer.suggested_fields import (
     get_suggested_case_fields,
+    get_non_discoverable_system_properties,
 )
 from corehq.apps.case_importer.tracking.case_upload_tracker import CaseUpload
 from corehq.apps.case_importer.util import (
@@ -372,6 +373,7 @@ def excel_fields(request, domain):
         'columns': columns,
         'excel_fields': excel_fields,
         'case_field_specs': case_field_specs,
+        'system_fields': get_non_discoverable_system_properties(),
         'domain': domain,
         'mirroring_enabled': mirroring_enabled,
         'is_bulk_import': request.POST.get('is_bulk_import', 'False') == 'True',