diff --git a/index.js b/index.js
index ec2bfde..963a5d8 100644
--- a/index.js
+++ b/index.js
@@ -179,7 +179,7 @@ export default class ActivityPubEndpoint {
     router.get("/admin/following", followingController(mp));
     router.get("/admin/activities", activitiesController(mp));
     router.get("/admin/migrate", migrateGetController(mp, this.options));
-    router.post("/admin/migrate", migratePostController(mp, this.options));
+    router.post("/admin/migrate", express.urlencoded({ extended: true, limit: "5mb" }), migratePostController(mp, this.options));
 
     return router;
   }
diff --git a/lib/controllers/migrate.js b/lib/controllers/migrate.js
index 6b02b48..1677279 100644
--- a/lib/controllers/migrate.js
+++ b/lib/controllers/migrate.js
@@ -63,11 +63,12 @@ export function migratePostController(mountPath, pluginOptions) {
             text: response.locals.__("activitypub.migrate.errorNoFile"),
           };
         } else {
-          let followingResult = { imported: 0, failed: 0 };
-          let followersResult = { imported: 0, failed: 0 };
+          let followingResult = { imported: 0, failed: 0, errors: [] };
+          let followersResult = { imported: 0, failed: 0, errors: [] };
 
           if (importFollowing && followingCollection) {
             const handles = parseMastodonFollowingCsv(fileContent);
+            console.log(`[ActivityPub] Migration: parsed ${handles.length} following handles from CSV`);
             followingResult = await bulkImportFollowing(
               handles,
               followingCollection,
@@ -76,6 +77,7 @@ export function migratePostController(mountPath, pluginOptions) {
 
           if (importFollowers && followersCollection) {
             const entries = parseMastodonFollowersList(fileContent);
+            console.log(`[ActivityPub] Migration: parsed ${entries.length} follower entries from CSV`);
             followersResult = await bulkImportFollowers(
               entries,
               followersCollection,
@@ -84,13 +86,28 @@ export function migratePostController(mountPath, pluginOptions) {
 
           const totalFailed =
             followingResult.failed + followersResult.failed;
+          const allErrors = [
+            ...followingResult.errors,
+            ...followersResult.errors,
+          ];
+
+          let text = response.locals
+            .__("activitypub.migrate.success")
+            .replace("%d", followingResult.imported)
+            .replace("%d", followersResult.imported)
+            .replace("%d", totalFailed);
+
+          if (allErrors.length > 0) {
+            text += " " + response.locals
+              .__("activitypub.migrate.failedList")
+              .replace("%s", allErrors.join(", "));
+          }
+
           result = {
-            type: "success",
-            text: response.locals
-              .__("activitypub.migrate.success")
-              .replace("%d", followingResult.imported)
-              .replace("%d", followersResult.imported)
-              .replace("%d", totalFailed),
+            type: totalFailed > 0 && followingResult.imported + followersResult.imported === 0
+              ? "error"
+              : "success",
+            text,
           };
         }
       }
diff --git a/lib/migration.js b/lib/migration.js
index 11ccdea..cd3a4f7 100644
--- a/lib/migration.js
+++ b/lib/migration.js
@@ -54,7 +54,10 @@ export function parseMastodonFollowersList(text) {
  */
 export async function resolveHandleViaWebFinger(handle) {
   const [user, domain] = handle.split("@");
-  if (!user || !domain) return null;
+  if (!user || !domain) {
+    console.warn(`[ActivityPub] Migration: invalid handle "${handle}" — skipping`);
+    return null;
+  }
 
   try {
     // WebFinger lookup
@@ -64,14 +67,20 @@ export async function resolveHandleViaWebFinger(handle) {
       signal: AbortSignal.timeout(10_000),
     });
 
-    if (!wfResponse.ok) return null;
+    if (!wfResponse.ok) {
+      console.warn(`[ActivityPub] Migration: WebFinger failed for ${handle} (HTTP ${wfResponse.status})`);
+      return null;
+    }
 
     const jrd = await wfResponse.json();
     const selfLink = jrd.links?.find(
       (l) => l.rel === "self" && l.type === "application/activity+json",
     );
 
-    if (!selfLink?.href) return null;
+    if (!selfLink?.href) {
+      console.warn(`[ActivityPub] Migration: no ActivityPub self link for ${handle}`);
+      return null;
+    }
 
     // Fetch actor document for inbox and profile
     const actorResponse = await fetch(selfLink.href, {
@@ -79,7 +88,10 @@ export async function resolveHandleViaWebFinger(handle) {
       signal: AbortSignal.timeout(10_000),
     });
 
-    if (!actorResponse.ok) return null;
+    if (!actorResponse.ok) {
+      console.warn(`[ActivityPub] Migration: actor fetch failed for ${handle} (HTTP ${actorResponse.status})`);
+      return null;
+    }
 
     const actor = await actorResponse.json();
     return {
@@ -89,7 +101,8 @@ export async function resolveHandleViaWebFinger(handle) {
       name: actor.name || actor.preferredUsername || handle,
       handle: actor.preferredUsername || user,
     };
-  } catch {
+  } catch (error) {
+    console.warn(`[ActivityPub] Migration: resolve failed for ${handle}: ${error.message}`);
     return null;
   }
 }
@@ -99,16 +112,23 @@ export async function resolveHandleViaWebFinger(handle) {
  *
  * @param {string[]} handles - Array of handles to import
  * @param {Collection} collection - MongoDB ap_following collection
- * @returns {Promise<{imported: number, failed: number}>}
+ * @returns {Promise<{imported: number, failed: number, errors: string[]}>}
  */
 export async function bulkImportFollowing(handles, collection) {
   let imported = 0;
   let failed = 0;
+  const errors = [];
+
+  console.log(`[ActivityPub] Migration: importing ${handles.length} following entries...`);
+
+  for (let i = 0; i < handles.length; i++) {
+    const handle = handles[i];
+    console.log(`[ActivityPub] Migration: resolving following ${i + 1}/${handles.length}: ${handle}`);
 
-  for (const handle of handles) {
     const resolved = await resolveHandleViaWebFinger(handle);
     if (!resolved) {
       failed++;
+      errors.push(handle);
       continue;
     }
 
@@ -130,7 +150,12 @@ export async function bulkImportFollowing(handles, collection) {
     imported++;
   }
 
-  return { imported, failed };
+  console.log(`[ActivityPub] Migration: following import complete — ${imported} imported, ${failed} failed`);
+  if (errors.length > 0) {
+    console.log(`[ActivityPub] Migration: failed handles: ${errors.join(", ")}`);
+  }
+
+  return { imported, failed, errors };
 }
 
 /**
@@ -140,15 +165,24 @@ export async function bulkImportFollowing(handles, collection) {
  *
  * @param {string[]} entries - Array of handles or actor URLs
  * @param {Collection} collection - MongoDB ap_followers collection
- * @returns {Promise<{imported: number, failed: number}>}
+ * @returns {Promise<{imported: number, failed: number, errors: string[]}>}
  */
 export async function bulkImportFollowers(entries, collection) {
   let imported = 0;
   let failed = 0;
+  const errors = [];
 
-  for (const entry of entries) {
+  console.log(`[ActivityPub] Migration: importing ${entries.length} follower entries...`);
+
+  for (let i = 0; i < entries.length; i++) {
+    const entry = entries[i];
     // If it's a URL, store directly; if it's a handle, resolve via WebFinger
     const isUrl = entry.startsWith("http");
+
+    if (!isUrl) {
+      console.log(`[ActivityPub] Migration: resolving follower ${i + 1}/${entries.length}: ${entry}`);
+    }
+
     let actorData;
 
     if (isUrl) {
@@ -159,6 +193,7 @@ export async function bulkImportFollowers(entries, collection) {
 
     if (!actorData) {
       failed++;
+      errors.push(entry);
       continue;
     }
 
@@ -180,5 +215,10 @@ export async function bulkImportFollowers(entries, collection) {
     imported++;
   }
 
-  return { imported, failed };
+  console.log(`[ActivityPub] Migration: follower import complete — ${imported} imported, ${failed} failed`);
+  if (errors.length > 0) {
+    console.log(`[ActivityPub] Migration: failed entries: ${errors.join(", ")}`);
+  }
+
+  return { imported, failed, errors };
 }
diff --git a/locales/en.json b/locales/en.json
index ef3cb70..dc96b12 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -43,6 +43,7 @@
       "step3Desc": "Once you have saved your alias and imported your data, go to your Mastodon instance → Preferences → Account → <strong>Move to a different account</strong>. Enter your new fediverse handle and confirm. Mastodon will notify all your followers, and those whose servers support it will automatically re-follow you here. This step is irreversible — your old account will become a redirect.",
       "errorNoFile": "Please select a CSV file before importing.",
       "success": "Imported %d following, %d followers (%d failed).",
+      "failedList": "Could not resolve: %s",
       "aliasSuccess": "Alias saved — your actor document now includes this account as alsoKnownAs."
     }
   }
diff --git a/package.json b/package.json
index 090e464..a180233 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rmdes/indiekit-endpoint-activitypub",
-  "version": "0.1.7",
+  "version": "0.1.8",
   "description": "ActivityPub federation endpoint for Indiekit via Fedify. Adds full fediverse support: actor, inbox, outbox, followers, following, syndication, and Mastodon migration.",
   "keywords": [
     "indiekit",