diff --git a/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.js b/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.js
index 521684ea91..0aac4d86db 100644
--- a/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.js
+++ b/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.js
@@ -37,7 +37,6 @@ export const getCommentDefinition = (comment, commentId, allComments, editor) =>
   const attributes = {
     'w:id': String(commentId),
     'w:author': comment.creatorName || comment.importedAuthor?.name,
-    'w:email': comment.creatorEmail || comment.importedAuthor?.email,
     'w:date': toIsoNoFractional(comment.createdTime),
     'w:initials': getInitials(comment.creatorName),
     'w:done': comment.resolvedTime ? '1' : '0',
@@ -48,6 +47,7 @@ export const getCommentDefinition = (comment, commentId, allComments, editor) =>
     'custom:trackedChangeType': comment.trackedChangeType,
     'custom:trackedChangeDisplayType': comment.trackedChangeDisplayType || null,
     'custom:trackedDeletedText': comment.deletedText || null,
+    'custom:authorEmail': comment.creatorEmail || comment.importedAuthor?.email,
   };
 
   // Add the w15:paraIdParent attribute if the comment has a parent
@@ -132,7 +132,6 @@ export const updateCommentsXml = (commentDefs = [], commentsXml) => {
     commentDef.attributes = {
       'w:id': commentDef.attributes['w:id'],
       'w:author': commentDef.attributes['w:author'],
-      'w:email': commentDef.attributes['w:email'],
       'w:date': commentDef.attributes['w:date'],
       'w:initials': commentDef.attributes['w:initials'],
       'custom:internalId': commentDef.attributes['custom:internalId'],
@@ -141,6 +140,7 @@ export const updateCommentsXml = (commentDefs = [], commentsXml) => {
       'custom:trackedChangeType': commentDef.attributes['custom:trackedChangeType'],
       'custom:trackedChangeDisplayType': commentDef.attributes['custom:trackedChangeDisplayType'],
       'custom:trackedDeletedText': commentDef.attributes['custom:trackedDeletedText'],
+      'custom:authorEmail': commentDef.attributes['custom:authorEmail'],
       'xmlns:custom': 'http://schemas.openxmlformats.org/wordprocessingml/2006/main',
     };
   });
@@ -400,10 +400,14 @@ export const prepareCommentsXmlFilesForExport = ({
   relationships.push(generateRelationship('comments.xml'));
   emittedTargets.add('comments.xml');
 
+  const forceWordThreadingProfile =
+    threadingProfile?.defaultStyle === 'range-based' && exportStrategy !== 'google-docs';
+  const effectiveThreadingProfile = forceWordThreadingProfile ? 'word' : threadingProfile || exportStrategy;
+
   const commentsExtendedXml = updateCommentsExtendedXml(
     commentsWithParaIds,
     updatedXml['word/commentsExtended.xml'],
-    threadingProfile || exportStrategy,
+    effectiveThreadingProfile,
   );
 
   // Only add the file and relationship if we're actually generating commentsExtended.xml
diff --git a/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.test.js b/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.test.js
index 617acadd71..bc861da6b5 100644
--- a/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.test.js
+++ b/packages/super-editor/src/editors/v1/core/super-converter/v2/exporter/commentsExporter.test.js
@@ -381,12 +381,65 @@ describe('prepareCommentsXmlFilesForExport', () => {
       expect(result.removedTargets).toHaveLength(0);
     });
   });
+
+  describe('threading profile overrides', () => {
+    it('forces Word-style threading when export strategy is Word but profile is range-based', () => {
+      const threadingProfile = {
+        defaultStyle: 'range-based',
+        mixed: false,
+        fileSet: {
+          hasCommentsExtended: false,
+          hasCommentsExtensible: false,
+          hasCommentsIds: false,
+        },
+      };
+
+      const result = prepareCommentsXmlFilesForExport({
+        convertedXml: makeConvertedXml(),
+        defs,
+        commentsWithParaIds,
+        exportType: 'external',
+        threadingProfile,
+      });
+
+      expect(result.documentXml['word/commentsExtended.xml']).toBeDefined();
+      const rel = result.relationships.find((r) => r.attributes.Target === 'commentsExtended.xml');
+      expect(rel).toBeDefined();
+    });
+
+    it('still honors Google Docs export strategy when all comments originate from Google Docs', () => {
+      const threadingProfile = {
+        defaultStyle: 'range-based',
+        mixed: false,
+        fileSet: {
+          hasCommentsExtended: false,
+          hasCommentsExtensible: false,
+          hasCommentsIds: false,
+        },
+      };
+
+      const googleComments = [makeComment({ origin: 'google-docs' })];
+
+      const result = prepareCommentsXmlFilesForExport({
+        convertedXml: makeConvertedXml(),
+        defs,
+        commentsWithParaIds: googleComments,
+        exportType: 'external',
+        threadingProfile,
+      });
+
+      expect(result.documentXml['word/commentsExtended.xml']).toBeUndefined();
+      const rel = result.relationships.find((r) => r.attributes.Target === 'commentsExtended.xml');
+      expect(rel).toBeUndefined();
+    });
+  });
 });
 
 describe('getCommentDefinition', () => {
   it('preserves tracked change display metadata for exported tracked-change comments', () => {
     const definition = getCommentDefinition(
       makeComment({
+        creatorEmail: 'author@example.com',
         trackedChange: true,
         trackedChangeType: 'trackFormat',
         trackedChangeText: 'https://example.com',
@@ -400,6 +453,8 @@ describe('getCommentDefinition', () => {
     expect(definition.attributes['custom:trackedChangeType']).toBe('trackFormat');
     expect(definition.attributes['custom:trackedChangeText']).toBe('https://example.com');
     expect(definition.attributes['custom:trackedChangeDisplayType']).toBe('hyperlinkAdded');
+    expect(definition.attributes['custom:authorEmail']).toBe('author@example.com');
+    expect(definition.attributes['w:email']).toBeUndefined();
   });
 });
 
@@ -609,5 +664,31 @@ describe('updateCommentsXml', () => {
     const lastParagraph = updatedComment.elements[updatedComment.elements.length - 1];
 
     expect(lastParagraph.attributes['w14:paraId']).toBe('ABC12345');
+    expect(updatedComment.attributes['w:email']).toBeUndefined();
+    expect(updatedComment.attributes['custom:authorEmail']).toBeUndefined();
+  });
+
+  it('preserves custom author email attribute and omits w:email', () => {
+    const commentDef = {
+      type: 'element',
+      name: 'w:comment',
+      attributes: {
+        'w:id': '1',
+        'w:author': 'Author',
+        'w:initials': 'A',
+        'w15:paraId': 'EMAIL123',
+        'custom:authorEmail': 'author@example.com',
+      },
+      elements: [{ type: 'element', name: 'w:p', attributes: {}, elements: [] }],
+    };
+    const commentsXml = {
+      elements: [{ elements: [] }],
+    };
+
+    const result = updateCommentsXml([commentDef], commentsXml);
+    const updatedComment = result.elements[0].elements[0];
+
+    expect(updatedComment.attributes['w:email']).toBeUndefined();
+    expect(updatedComment.attributes['custom:authorEmail']).toBe('author@example.com');
   });
 });
diff --git a/packages/super-editor/src/editors/v1/core/super-converter/v2/importer/documentCommentsImporter.js b/packages/super-editor/src/editors/v1/core/super-converter/v2/importer/documentCommentsImporter.js
index aa4b7431b5..1d36f9bd3b 100644
--- a/packages/super-editor/src/editors/v1/core/super-converter/v2/importer/documentCommentsImporter.js
+++ b/packages/super-editor/src/editors/v1/core/super-converter/v2/importer/documentCommentsImporter.js
@@ -35,7 +35,7 @@ export function importCommentData({ docx, editor, converter }) {
     const { attributes } = el;
     const importedId = attributes['w:id'];
     const authorName = attributes['w:author'];
-    const authorEmail = attributes['w:email'];
+    const authorEmail = attributes['w:email'] ?? attributes['custom:authorEmail'];
     const initials = attributes['w:initials'];
     const createdDate = attributes['w:date'];
     const internalId = attributes['custom:internalId'];
diff --git a/packages/super-editor/src/editors/v1/tests/import/documentCommentsImporter.unit.test.js b/packages/super-editor/src/editors/v1/tests/import/documentCommentsImporter.unit.test.js
index f9e5541484..9453264852 100644
--- a/packages/super-editor/src/editors/v1/tests/import/documentCommentsImporter.unit.test.js
+++ b/packages/super-editor/src/editors/v1/tests/import/documentCommentsImporter.unit.test.js
@@ -42,6 +42,7 @@ const buildDocx = ({ comments = [], extended = [], documentRanges = [] } = {}) =
       'custom:trackedChangeType': comment.trackedChangeType,
       'custom:trackedChangeDisplayType': comment.trackedChangeDisplayType,
       'custom:trackedDeletedText': comment.trackedDeletedText,
+      ...(comment.customAuthorEmail ? { 'custom:authorEmail': comment.customAuthorEmail } : {}),
     },
     elements: comment.elements ?? [{ fakeParaId: comment.paraId ?? `para-${comment.id}` }],
   }));
@@ -257,6 +258,22 @@ describe('importCommentData metadata parsing', () => {
     const [comment] = importCommentData({ docx });
     expect(comment.elements).toHaveLength(2);
   });
+
+  it('reads custom:authorEmail when w:email is absent', () => {
+    const docx = buildDocx({
+      comments: [
+        {
+          id: 6,
+          author: 'Custom Email',
+          customAuthorEmail: 'custom@example.com',
+        },
+      ],
+    });
+    delete docx['word/comments.xml'].elements[0].elements[0].attributes['w:email'];
+
+    const [comment] = importCommentData({ docx });
+    expect(comment.creatorEmail).toBe('custom@example.com');
+  });
 });
 
 describe('importCommentData extended metadata', () => {