diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0fab3a9e..78c99f47 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+### [Unreleased]
+* Added support for `include_hidden_folders` query parameter in folders list endpoint for Microsoft accounts to control whether hidden folders are included in the response
+
 ### 6.5.0 / 2025-06-13
 * Replaced `rest-client` dependency with `httparty` for improved maintainability and security
   - `rest-client` is no longer actively maintained and has known security vulnerabilities
diff --git a/lib/nylas/resources/folders.rb b/lib/nylas/resources/folders.rb
index 1d021b6e..00c61170 100644
--- a/lib/nylas/resources/folders.rb
+++ b/lib/nylas/resources/folders.rb
@@ -15,6 +15,7 @@ class Folders < Resource
     #
     # @param identifier [String] Grant ID or email account to query.
     # @param query_params [Hash, nil] Query params to pass to the request.
+    #   - include_hidden_folders [Boolean] (Microsoft only) When true, includes hidden folders.
     # @return [Array(Array(Hash), String, String)] The list of folders, API Request ID, and next cursor.
     def list(identifier:, query_params: nil)
       get_list(
diff --git a/spec/nylas/resources/folders_spec.rb b/spec/nylas/resources/folders_spec.rb
index 63551aae..e226cb5e 100644
--- a/spec/nylas/resources/folders_spec.rb
+++ b/spec/nylas/resources/folders_spec.rb
@@ -34,6 +34,19 @@
 
       expect(folders_response).to eq(list_response)
     end
+
+    it "calls the get method with the correct query parameters including include_hidden_folders" do
+      identifier = "abc-123-grant-id"
+      query_params = { include_hidden_folders: true }
+      path = "#{api_uri}/v3/grants/#{identifier}/folders"
+      allow(folders).to receive(:get_list)
+        .with(path: path, query_params: query_params)
+        .and_return(list_response)
+
+      folders_response = folders.list(identifier: identifier, query_params: query_params)
+
+      expect(folders_response).to eq(list_response)
+    end
   end
 
   describe "#find" do