diff --git a/moneymgr_web/package-lock.json b/moneymgr_web/package-lock.json
index cca96de..90572c6 100644
--- a/moneymgr_web/package-lock.json
+++ b/moneymgr_web/package-lock.json
@@ -26,7 +26,8 @@
         "react": "^19.1.0",
         "react-dom": "^19.1.0",
         "react-router": "^7.4.1",
-        "react-router-dom": "^7.4.1"
+        "react-router-dom": "^7.4.1",
+        "ts-pattern": "^5.7.0"
       },
       "devDependencies": {
         "@eslint/js": "^9.23.0",
@@ -4575,7 +4576,6 @@
       "version": "5.7.0",
       "resolved": "https://registry.npmjs.org/ts-pattern/-/ts-pattern-5.7.0.tgz",
       "integrity": "sha512-0/FvIG4g3kNkYgbNwBBW5pZBkfpeYQnH+2AA3xmjkCAit/DSDPKmgwC3fKof4oYUq6gupClVOJlFl+939VRBMg==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/tslib": {
diff --git a/moneymgr_web/package.json b/moneymgr_web/package.json
index dfdd22b..00953fb 100644
--- a/moneymgr_web/package.json
+++ b/moneymgr_web/package.json
@@ -28,7 +28,8 @@
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "react-router": "^7.4.1",
-    "react-router-dom": "^7.4.1"
+    "react-router-dom": "^7.4.1",
+    "ts-pattern": "^5.7.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.23.0",
diff --git a/moneymgr_web/src/dialogs/AttachMultipleInboxEntriesDialog.tsx b/moneymgr_web/src/dialogs/AttachMultipleInboxEntriesDialog.tsx
index 86f6419..3817587 100644
--- a/moneymgr_web/src/dialogs/AttachMultipleInboxEntriesDialog.tsx
+++ b/moneymgr_web/src/dialogs/AttachMultipleInboxEntriesDialog.tsx
@@ -1,25 +1,76 @@
+import ArrowForwardIcon from "@mui/icons-material/ArrowForward";
 import {
   Button,
   Dialog,
   DialogActions,
   DialogContent,
   DialogTitle,
+  Divider,
 } from "@mui/material";
+import React from "react";
 import { InboxEntry } from "../api/InboxApi";
 import { Movement } from "../api/MovementsApi";
+import { MovementSelect } from "../widgets/forms/MovementSelect";
+import { InboxEntryWidget } from "../widgets/InboxEntryWidget";
 
 export function AttachMultipleInboxEntriesDialog(p: {
   open: boolean;
   entries: InboxEntry[];
   movements: Movement[][];
   onClose: () => void;
-  onSelected: (mapping: (number | undefined)[]) => void;
+  onSelected: (mapping: (Movement | undefined)[]) => void;
 }): React.ReactElement {
-  const handleSubmit = () => {};
+  const [mapping, setMapping] = React.useState<(Movement | undefined)[]>(
+    p.movements.map(() => undefined)
+  );
+
+  const handleSubmit = () => {
+    p.onSelected(mapping);
+  };
+
   return (
-    <Dialog open={p.open} onClose={p.onClose}>
+    <Dialog open={p.open} onClose={p.onClose} fullScreen>
       <DialogTitle>Attach multiple entries to movements</DialogTitle>
-      <DialogContent>TODO</DialogContent>
+      <DialogContent>
+        {p.entries.map((entry, num) => {
+          return (
+            <div>
+              <div
+                style={{
+                  padding: "5px",
+                  display: "flex",
+                  alignItems: "center",
+                }}
+              >
+                <span style={{ flex: 1 }}>
+                  <InboxEntryWidget entry={entry} />
+                </span>
+                <ArrowForwardIcon />
+                <span
+                  style={{ flex: 1, display: "flex", justifyContent: "end" }}
+                >
+                  {p.movements[num].length > 0 ? (
+                    <MovementSelect
+                      list={p.movements[num]}
+                      value={mapping[num]}
+                      onChange={(v) =>
+                        setMapping((m) => {
+                          const n = [...m];
+                          n[num] = v;
+                          return n;
+                        })
+                      }
+                    />
+                  ) : (
+                    <>No movement found</>
+                  )}
+                </span>
+              </div>
+              <Divider />
+            </div>
+          );
+        })}
+      </DialogContent>
       <DialogActions>
         <Button onClick={p.onClose}>Cancel</Button>
         <Button onClick={handleSubmit} autoFocus>
diff --git a/moneymgr_web/src/routes/InboxRoute.tsx b/moneymgr_web/src/routes/InboxRoute.tsx
index 5e121e0..a73d7f7 100644
--- a/moneymgr_web/src/routes/InboxRoute.tsx
+++ b/moneymgr_web/src/routes/InboxRoute.tsx
@@ -242,9 +242,13 @@ function InboxTable(p: {
       );
       if (!targetAccount) return;
 
-      const entries = p.entries.filter((m) => rowSelectionModel.includes(m.id));
+      // Find the entry to map
+      const entries = p.entries.filter(
+        (m) => rowSelectionModel.includes(m.id) && !m.movement_id
+      );
       const movements: Movement[][] = [];
 
+      // Search for applicable movements
       for (const [num, e] of entries.entries()) {
         loadingMessage.show(
           `Searching for proper movements ${num}/${entries.length}`
@@ -277,8 +281,43 @@ function InboxTable(p: {
     setAttachMultipleMovements(undefined);
   };
 
-  const handlePerformAttachMultiple = (mapping: (number | undefined)[]) => {
-    console.info(attachMultipleEntries, attachMultipleMovements, mapping);
+  const handlePerformAttachMultiple = async (
+    mapping: (Movement | undefined)[]
+  ) => {
+    try {
+      for (const [num, entry] of attachMultipleEntries!.entries()) {
+        loadingMessage.show(`Attaching ${num} of ${mapping.length}`);
+
+        const movement = mapping[num];
+        if (!movement) continue;
+
+        await Promise.all([
+          // Update movement
+          MovementApi.Update({
+            ...movement,
+            file_id: entry?.file_id,
+          }),
+
+          // Update inbox entries
+          InboxApi.Update({
+            ...entry!,
+            movement_id: movement.id,
+          }),
+        ]);
+      }
+
+      setAttachMultipleEntries(undefined);
+      setAttachMultipleMovements(undefined);
+
+      snackbar("Mapping successfully performed!");
+
+      p.onReload(false);
+    } catch (e) {
+      console.error("Performing mapping...", e);
+      alert(`Failed to perform mapping! ${e}`);
+    } finally {
+      loadingMessage.hide();
+    }
   };
 
   // Delete multiple inbox entries
diff --git a/moneymgr_web/src/widgets/InboxEntryWidget.tsx b/moneymgr_web/src/widgets/InboxEntryWidget.tsx
new file mode 100644
index 0000000..60c76ff
--- /dev/null
+++ b/moneymgr_web/src/widgets/InboxEntryWidget.tsx
@@ -0,0 +1,63 @@
+import CallMadeIcon from "@mui/icons-material/CallMade";
+import CallReceivedIcon from "@mui/icons-material/CallReceived";
+import QuestionMarkIcon from "@mui/icons-material/QuestionMark";
+import React from "react";
+import { match } from "ts-pattern";
+import { InboxEntry } from "../api/InboxApi";
+import { fmtDateFromTime } from "../utils/DateUtils";
+import { AmountWidget } from "./AmountWidget";
+import { UploadedFileWidget } from "./UploadedFileWidget";
+
+export function InboxEntryWidget(p: { entry: InboxEntry }): React.ReactElement {
+  return (
+    <span
+      style={{
+        display: "inline-flex",
+        alignItems: "center",
+        height: "100%",
+      }}
+    >
+      {/* File */}
+      <UploadedFileWidget small file_id={p.entry.file_id} />
+
+      {/* Icon */}
+      {match(p.entry.amount)
+        .when(
+          (v) => v === undefined || v === null,
+          () => <QuestionMarkIcon color="secondary" />
+        )
+        .when(
+          (v) => v > 0,
+          () => <CallReceivedIcon color="success" />
+        )
+        .otherwise(() => (
+          <CallMadeIcon color="error" />
+        ))}
+
+      <span
+        style={{
+          marginLeft: "5px",
+          display: "inline-flex",
+          flexDirection: "column",
+          justifyContent: "center",
+          height: "100%",
+        }}
+      >
+        <span style={{ height: "1em", lineHeight: 1 }}>
+          {(p.entry.label?.length ?? 0) > 0 ? p.entry.label : <i>No label</i>}
+        </span>
+        <span style={{ display: "flex", alignItems: "center", lineHeight: 1 }}>
+          {p.entry.amount ? (
+            <AmountWidget amount={p.entry.amount} />
+          ) : (
+            <i>No amount</i>
+          )}
+          <span style={{ width: "0.5em" }} />
+          &bull;
+          <span style={{ width: "0.5em" }} />
+          {fmtDateFromTime(p.entry.time)}
+        </span>
+      </span>
+    </span>
+  );
+}
diff --git a/moneymgr_web/src/widgets/UploadedFileWidget.tsx b/moneymgr_web/src/widgets/UploadedFileWidget.tsx
index e1e323c..022b018 100644
--- a/moneymgr_web/src/widgets/UploadedFileWidget.tsx
+++ b/moneymgr_web/src/widgets/UploadedFileWidget.tsx
@@ -1,13 +1,16 @@
 import ImageIcon from "@mui/icons-material/Image";
 import PictureAsPdfIcon from "@mui/icons-material/PictureAsPdf";
-import { Button } from "@mui/material";
+import { Button, IconButton } from "@mui/material";
 import { filesize } from "filesize";
 import React from "react";
 import { FileApi, UploadedFile } from "../api/FileApi";
-import { AsyncWidget } from "./AsyncWidget";
 import { FileViewerDialog } from "../dialogs/FileViewerDialog";
+import { AsyncWidget } from "./AsyncWidget";
 
-export function UploadedFileWidget(p: { file_id: number }): React.ReactElement {
+export function UploadedFileWidget(p: {
+  file_id: number;
+  small?: boolean;
+}): React.ReactElement {
   const [file, setFile] = React.useState<UploadedFile | null>(null);
 
   const load = async () => {
@@ -17,7 +20,7 @@ export function UploadedFileWidget(p: { file_id: number }): React.ReactElement {
   return (
     <AsyncWidget
       errMsg="Failed"
-      build={() => <UploadedFileWidgetInner file={file!} />}
+      build={() => <UploadedFileWidgetInner file={file!} small={p.small} />}
       loadKey={p.file_id}
       load={load}
     />
@@ -25,6 +28,7 @@ export function UploadedFileWidget(p: { file_id: number }): React.ReactElement {
 }
 
 function UploadedFileWidgetInner(p: {
+  small?: boolean;
   file: UploadedFile;
 }): React.ReactElement {
   const [open, setOpen] = React.useState(false);
@@ -33,20 +37,36 @@ function UploadedFileWidgetInner(p: {
       <FileViewerDialog
         open={open}
         file={p.file}
-        onClose={() => { setOpen(false); }}
+        onClose={() => {
+          setOpen(false);
+        }}
       />
-      <Button
-        startIcon={
-          p.file.mime_type === "application/pdf" ? (
-            <PictureAsPdfIcon />
-          ) : (
-            <ImageIcon />
-          )
-        }
-        onClick={() => { setOpen(true); }}
-      >
-        {p.file.file_name} ({filesize(p.file.file_size)})
-      </Button>
+      {p.small ? (
+        <IconButton
+          onClick={() => {
+            setOpen(true);
+          }}
+        >
+          <FileIcon file={p.file} />
+        </IconButton>
+      ) : (
+        <Button
+          startIcon={<FileIcon file={p.file} />}
+          onClick={() => {
+            setOpen(true);
+          }}
+        >
+          {p.file.file_name} ({filesize(p.file.file_size)})
+        </Button>
+      )}
     </>
   );
 }
+
+function FileIcon(p: { file: UploadedFile }): React.ReactElement {
+  return p.file.mime_type === "application/pdf" ? (
+    <PictureAsPdfIcon />
+  ) : (
+    <ImageIcon />
+  );
+}
diff --git a/moneymgr_web/src/widgets/forms/MovementSelect.tsx b/moneymgr_web/src/widgets/forms/MovementSelect.tsx
new file mode 100644
index 0000000..7c5dcf8
--- /dev/null
+++ b/moneymgr_web/src/widgets/forms/MovementSelect.tsx
@@ -0,0 +1,31 @@
+import { MenuItem, Select, SelectChangeEvent } from "@mui/material";
+import { Movement } from "../../api/MovementsApi";
+import { MovementWidget } from "../MovementWidget";
+
+export function MovementSelect(p: {
+  list: Movement[];
+  value: Movement | undefined;
+  onChange: (value: Movement | undefined) => void;
+}): React.ReactElement {
+  const handleChange = (event: SelectChangeEvent) => {
+    if (!event.target.value) {
+      p.onChange(undefined);
+      return;
+    }
+    const id = Number(event.target.value);
+    p.onChange(p.list.find((m) => m.id === id));
+  };
+
+  return (
+    <Select value={p.value?.id.toString()} onChange={handleChange}>
+      <MenuItem value={undefined}>
+        <i>None</i>
+      </MenuItem>
+      {p.list.map((l) => (
+        <MenuItem key={l.id} value={l.id.toString()}>
+          <MovementWidget movement={l} />
+        </MenuItem>
+      ))}
+    </Select>
+  );
+}