diff --git a/app/assets/javascripts/admin/addon/components/modal/delete-posts-confirmation.hbs b/app/assets/javascripts/admin/addon/components/modal/delete-posts-confirmation.hbs
new file mode 100644
index 00000000000..8d8680d9b62
--- /dev/null
+++ b/app/assets/javascripts/admin/addon/components/modal/delete-posts-confirmation.hbs
@@ -0,0 +1,36 @@
+<DModal
+  @title={{html-safe
+    (i18n
+      "admin.user.delete_posts.confirmation.title" username=@model.user.username
+    )
+  }}
+  @closeModal={{@closeModal}}
+>
+  <:body>
+    <p>{{html-safe
+        (i18n
+          "admin.user.delete_posts.confirmation.description"
+          username=@model.user.username
+          post_count=@model.user.post_count
+          text=this.text
+        )
+      }}</p>
+    <Input @type="text" @value={{this.value}} />
+  </:body>
+  <:footer>
+    <DButton
+      class="btn-danger"
+      @action={{@model.deleteAllPosts}}
+      @icon="trash-alt"
+      @disabled={{this.deleteDisabled}}
+      @translatedLabel={{i18n
+        "admin.user.delete_posts.confirmation.delete"
+        username=@model.user.username
+      }}
+    />
+    <DButton
+      @action={{@closeModal}}
+      @label="admin.user.delete_posts.confirmation.cancel"
+    />
+  </:footer>
+</DModal>
\ No newline at end of file
diff --git a/app/assets/javascripts/admin/addon/components/modal/delete-posts-confirmation.js b/app/assets/javascripts/admin/addon/components/modal/delete-posts-confirmation.js
new file mode 100644
index 00000000000..62d8dadfe35
--- /dev/null
+++ b/app/assets/javascripts/admin/addon/components/modal/delete-posts-confirmation.js
@@ -0,0 +1,18 @@
+import Component from "@glimmer/component";
+import { tracked } from "@glimmer/tracking";
+import I18n from "I18n";
+
+export default class DeletePostsConfirmation extends Component {
+  @tracked value;
+
+  get text() {
+    return I18n.t("admin.user.delete_posts.confirmation.text", {
+      username: this.args.model.user.username,
+      post_count: this.args.model.user.post_count,
+    });
+  }
+
+  get deleteDisabled() {
+    return !this.value || this.text !== this.value;
+  }
+}
diff --git a/app/assets/javascripts/admin/addon/controllers/admin-user-index.js b/app/assets/javascripts/admin/addon/controllers/admin-user-index.js
index 8de9af05d51..b9cc4c247fc 100644
--- a/app/assets/javascripts/admin/addon/controllers/admin-user-index.js
+++ b/app/assets/javascripts/admin/addon/controllers/admin-user-index.js
@@ -13,6 +13,7 @@ import getURL from "discourse-common/lib/get-url";
 import { htmlSafe } from "@ember/template";
 import { extractError, popupAjaxError } from "discourse/lib/ajax-error";
 import showModal from "discourse/lib/show-modal";
+import DeletePostsConfirmationModal from "../components/modal/delete-posts-confirmation";
 
 export default class AdminUserIndexController extends Controller.extend(
   CanCheckEmails
@@ -20,6 +21,7 @@ export default class AdminUserIndexController extends Controller.extend(
   @service router;
   @service dialog;
   @service adminTools;
+  @service modal;
 
   originalPrimaryGroupId = null;
   customGroupIdsBuffer = null;
@@ -619,9 +621,8 @@ export default class AdminUserIndexController extends Controller.extend(
 
   @action
   showDeletePostsConfirmation() {
-    showModal("admin-delete-posts-confirmation", {
-      admin: true,
-      model: this.model,
+    this.modal.show(DeletePostsConfirmationModal, {
+      model: { user: this.model, deleteAllPosts: this.deleteAllPosts },
     });
   }
 
diff --git a/app/assets/javascripts/admin/addon/controllers/modals/admin-delete-posts-confirmation.js b/app/assets/javascripts/admin/addon/controllers/modals/admin-delete-posts-confirmation.js
deleted file mode 100644
index b07fa7f7830..00000000000
--- a/app/assets/javascripts/admin/addon/controllers/modals/admin-delete-posts-confirmation.js
+++ /dev/null
@@ -1,49 +0,0 @@
-import { alias } from "@ember/object/computed";
-import Controller, { inject as controller } from "@ember/controller";
-import I18n from "I18n";
-import ModalFunctionality from "discourse/mixins/modal-functionality";
-import { action } from "@ember/object";
-import discourseComputed from "discourse-common/utils/decorators";
-
-export default class AdminDeletePostsConfirmationController extends Controller.extend(
-  ModalFunctionality
-) {
-  @controller adminUserIndex;
-
-  @alias("model.username") username;
-  @alias("model.post_count") postCount;
-
-  onShow() {
-    this.set("value", null);
-  }
-
-  @discourseComputed("username", "postCount")
-  text(username, postCount) {
-    return I18n.t(`admin.user.delete_posts.confirmation.text`, {
-      username,
-      postCount,
-    });
-  }
-
-  @discourseComputed("username")
-  deleteButtonText(username) {
-    return I18n.t(`admin.user.delete_posts.confirmation.delete`, {
-      username,
-    });
-  }
-
-  @discourseComputed("value", "text")
-  deleteDisabled(value, text) {
-    return !value || text !== value;
-  }
-
-  @action
-  confirm() {
-    this.adminUserIndex.send("deleteAllPosts");
-  }
-
-  @action
-  close() {
-    this.send("closeModal");
-  }
-}
diff --git a/app/assets/javascripts/admin/addon/templates/modal/admin-delete-posts-confirmation.hbs b/app/assets/javascripts/admin/addon/templates/modal/admin-delete-posts-confirmation.hbs
deleted file mode 100644
index 96349c3704f..00000000000
--- a/app/assets/javascripts/admin/addon/templates/modal/admin-delete-posts-confirmation.hbs
+++ /dev/null
@@ -1,32 +0,0 @@
-<div>
-  <DModalBody
-    @rawTitle={{i18n
-      "admin.user.delete_posts.confirmation.title"
-      username=this.username
-    }}
-  >
-    <p>{{html-safe
-        (i18n
-          "admin.user.delete_posts.confirmation.description"
-          username=this.username
-          post_count=this.postCount
-          text=this.text
-        )
-      }}</p>
-    <Input @type="text" @value={{this.value}} />
-  </DModalBody>
-
-  <div class="modal-footer">
-    <DButton
-      @class="btn-danger"
-      @action={{action "confirm"}}
-      @icon="trash-alt"
-      @disabled={{this.deleteDisabled}}
-      @translatedLabel={{this.deleteButtonText}}
-    />
-    <DButton
-      @action={{action "close"}}
-      @label="admin.user.delete_posts.confirmation.cancel"
-    />
-  </div>
-</div>
\ No newline at end of file
diff --git a/app/assets/javascripts/discourse/app/services/modal.js b/app/assets/javascripts/discourse/app/services/modal.js
index 252600fc323..6b25397d620 100644
--- a/app/assets/javascripts/discourse/app/services/modal.js
+++ b/app/assets/javascripts/discourse/app/services/modal.js
@@ -55,7 +55,6 @@ const KNOWN_LEGACY_MODALS = [
   "topic-summary",
   "user-status",
   "admin-add-upload",
-  "admin-delete-posts-confirmation",
   "admin-merge-users-prompt",
   "admin-start-backup",
   "admin-watched-word-test",