diff --git a/x-pack/plugins/alerting/server/saved_objects/index.ts b/x-pack/plugins/alerting/server/saved_objects/index.ts
index 8e76f28ff7fb8..8f11020ee6285 100644
--- a/x-pack/plugins/alerting/server/saved_objects/index.ts
+++ b/x-pack/plugins/alerting/server/saved_objects/index.ts
@@ -217,6 +217,11 @@ export function setupSavedObjects(
   // Encrypted attributes
   encryptedSavedObjects.registerType({
     type: RULE_SAVED_OBJECT_TYPE,
+    /**
+     * We disable enforcing random SO IDs for the rule SO
+     * to allow users creating rules with a predefined ID.
+     */
+    enforceRandomId: false,
     attributesToEncrypt: new Set(RuleAttributesToEncrypt),
     attributesToIncludeInAAD: new Set(RuleAttributesIncludedInAAD),
   });
diff --git a/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group1/create.ts b/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group1/create.ts
index 57d41424186b3..5a6385a3895d2 100644
--- a/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group1/create.ts
+++ b/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group1/create.ts
@@ -395,20 +395,18 @@ export default function createAlertTests({ getService }: FtrProviderContext) {
       });
     });
 
-    it('should not allow providing simple custom ids (non uuid)', async () => {
-      const customId = '1';
+    it('should create a rule with a predefined non random ID', async () => {
+      const ruleId = 'my_id';
+
       const response = await supertest
-        .post(`${getUrlPrefix(Spaces.space1.id)}/api/alerting/rule/${customId}`)
+        .post(`${getUrlPrefix(Spaces.space1.id)}/api/alerting/rule/${ruleId}`)
         .set('kbn-xsrf', 'foo')
-        .send(getTestRuleData());
+        .send(getTestRuleData())
+        .expect(200);
 
-      expect(response.status).to.eql(400);
-      expect(response.body).to.eql({
-        statusCode: 400,
-        error: 'Bad Request',
-        message:
-          'Predefined IDs are not allowed for saved objects with encrypted attributes unless the ID is a UUID.: Bad Request',
-      });
+      objectRemover.add(Spaces.space1.id, response.body.id, 'rule', 'alerting');
+
+      expect(response.body.id).to.eql(ruleId);
     });
 
     it('should return 409 when document with id already exists', async () => {