diff --git a/src/resources/MachineLearning/CaseClassificationConfiguration/CaseClassificationConfigurationInterfaces.ts b/src/resources/MachineLearning/CaseClassificationConfiguration/CaseClassificationConfigurationInterfaces.ts
index e735e8f98..0ea16a2ef 100644
--- a/src/resources/MachineLearning/CaseClassificationConfiguration/CaseClassificationConfigurationInterfaces.ts
+++ b/src/resources/MachineLearning/CaseClassificationConfiguration/CaseClassificationConfigurationInterfaces.ts
@@ -128,7 +128,30 @@ export interface CaseClassificationDocumentGroupPreview {
     numberOfValidDocuments: number;
 }
 
-export interface CaseClassificationContentFieldsParams {
+export interface CaseClassificationContentFieldsAdvancedMode {
+    /**
+     * The query to use when building the model.
+     */
+    advancedQuery: string;
+    /**
+     * The case creation date range for the cases the model will use.
+     */
+    caseExtractionPeriod?: never;
+    /**
+     * An array of filtering conditions.
+     */
+    caseFilterConditions?: never;
+    /**
+     * The field value to use as language.
+     */
+    languageField?: never;
+    /**
+     * The names of the sources that contain the cases that the model will use.
+     */
+    sources?: never;
+}
+
+export interface CaseClassificationContentFieldsStandardMode {
     /**
      * The case creation date range for the cases the model will use.
      */
@@ -145,8 +168,16 @@ export interface CaseClassificationContentFieldsParams {
      * The names of the sources that contain the cases that the model will use.
      */
     sources: string[];
+    /**
+     * The query to use when building the model.
+     */
+    advancedQuery?: never;
 }
 
+export type CaseClassificationContentFieldsParams =
+    | CaseClassificationContentFieldsStandardMode
+    | CaseClassificationContentFieldsAdvancedMode;
+
 export interface CaseClassificationContentField {
     name: string;
 }
diff --git a/src/resources/MachineLearning/CaseClassificationConfiguration/tests/CaseClassificationConfiguration.spec.ts b/src/resources/MachineLearning/CaseClassificationConfiguration/tests/CaseClassificationConfiguration.spec.ts
index 317536d8a..d594486c0 100644
--- a/src/resources/MachineLearning/CaseClassificationConfiguration/tests/CaseClassificationConfiguration.spec.ts
+++ b/src/resources/MachineLearning/CaseClassificationConfiguration/tests/CaseClassificationConfiguration.spec.ts
@@ -140,6 +140,15 @@ describe('CaseClassificationConfiguration', () => {
             expect(api.post).toHaveBeenCalledTimes(1);
             expect(api.post).toHaveBeenCalledWith(CaseClassificationConfiguration.fieldsUrl, params);
         });
+
+        it('should make a POST call to retrieve valid content field candidates for the Case Classification model configuration with an advancedQuery', () => {
+            const params = {advancedQuery: "@source='some source'"};
+
+            ccConfig.fields(params);
+
+            expect(api.post).toHaveBeenCalledTimes(1);
+            expect(api.post).toHaveBeenCalledWith(CaseClassificationConfiguration.fieldsUrl, params);
+        });
     });
 
     describe('preview', () => {