diff --git a/book/chapters/config.md b/book/chapters/config.md
index d062c659..30ca48ef 100644
--- a/book/chapters/config.md
+++ b/book/chapters/config.md
@@ -87,6 +87,10 @@ app.allow_config_extras(CLI::config_extras_mode::ignore_all);
 will completely ignore any mismatches, extras, or other issues with the config
 file
 
+Config file extras are stored in the remaining output as two components. The
+first is the name of the field including subcommands using dot notation the
+second (or more) are the argument fields.
+
 ### Getting the used configuration file name
 
 If it is needed to get the configuration file name used this can be obtained via
diff --git a/include/CLI/impl/App_inl.hpp b/include/CLI/impl/App_inl.hpp
index 01d74e6d..7d487442 100644
--- a/include/CLI/impl/App_inl.hpp
+++ b/include/CLI/impl/App_inl.hpp
@@ -1414,6 +1414,9 @@ CLI11_INLINE bool App::_parse_single_config(const ConfigItem &item, std::size_t
         if(get_allow_config_extras() == config_extras_mode::capture)
             // Should we worry about classifying the extras properly?
             missing_.emplace_back(detail::Classifier::NONE, item.fullname());
+        for(const auto &input : item.inputs) {
+            missing_.emplace_back(detail::Classifier::NONE, input);
+        }
         return false;
     }
 
diff --git a/tests/ConfigFileTest.cpp b/tests/ConfigFileTest.cpp
index eb6af960..b043b110 100644
--- a/tests/ConfigFileTest.cpp
+++ b/tests/ConfigFileTest.cpp
@@ -509,10 +509,47 @@ TEST_CASE_METHOD(TApp, "IniGetRemainingOption", "[config]") {
     int two{0};
     app.add_option("--two", two);
     REQUIRE_NOTHROW(run());
-    std::vector<std::string> ExpectedRemaining = {ExtraOption};
+    std::vector<std::string> ExpectedRemaining = {ExtraOption, "3"};
     CHECK(ExpectedRemaining == app.remaining());
 }
 
+TEST_CASE_METHOD(TApp, "IniRemainingSub", "[config]") {
+    TempFile tmpini{"TestIniTmp.ini"};
+
+    app.set_config("--config", tmpini);
+    auto *map = app.add_subcommand("map");
+    map->allow_config_extras();
+
+    {
+        std::ofstream out{tmpini};
+        out << "[map]\n";
+        out << "a = 1\n";
+        out << "b=[1,2,3]\n";
+        out << "c = 3" << std::endl;
+    }
+
+    REQUIRE_NOTHROW(run());
+    std::vector<std::string> rem = map->remaining();
+    REQUIRE(rem.size() == 8U);
+    CHECK(rem[0] == "map.a");
+    CHECK(rem[2] == "map.b");
+    CHECK(rem[6] == "map.c");
+    CHECK(rem[5] == "3");
+
+    int a{0};
+    int c{0};
+    std::vector<int> b;
+    map->add_option("-a", a);
+    map->add_option("-b", b);
+    map->add_option("-c", c);
+
+    CHECK_NOTHROW(app.parse(app.remaining_for_passthrough()));
+    CHECK(a == 1);
+    CHECK(c == 3);
+    REQUIRE(b.size() == 3U);
+    CHECK(b[1] == 2);
+}
+
 TEST_CASE_METHOD(TApp, "IniGetNoRemaining", "[config]") {
     TempFile tmpini{"TestIniTmp.ini"};