diff --git a/packages/dids/src/did-ion.ts b/packages/dids/src/did-ion.ts
index 1eaed9daa..baca61304 100644
--- a/packages/dids/src/did-ion.ts
+++ b/packages/dids/src/did-ion.ts
@@ -84,11 +84,11 @@ export class DidIonMethod implements DidMethod {
     operationsEndpoint?: string
   }): Promise<DidResolutionResult | undefined> {
     const {
-      challengeEnabled = true,
+      challengeEnabled = false,
       challengeEndpoint = 'https://beta.ion.msidentity.com/api/v1.0/proof-of-work-challenge',
       keySet,
       services,
-      operationsEndpoint = 'https://beta.ion.msidentity.com/api/v1.0/operations'
+      operationsEndpoint = 'https://ion.tbd.engineering/operations'
     } = options;
 
     // Create ION Document.
@@ -460,7 +460,7 @@ export class DidIonMethod implements DidMethod {
       };
     }
 
-    const { resolutionEndpoint = 'https://discover.did.msidentity.com/1.0/identifiers/' } = resolutionOptions;
+    const { resolutionEndpoint = 'https://ion.tbd.engineering/identifiers/' } = resolutionOptions;
     const normalizeUrl = (url: string): string => url.endsWith('/') ? url : url + '/';
     const resolutionUrl = `${normalizeUrl(resolutionEndpoint)}${parsedDid.did}`;
 
diff --git a/packages/dids/tests/did-ion.spec.ts b/packages/dids/tests/did-ion.spec.ts
index 0f3bcbe14..17b45de12 100644
--- a/packages/dids/tests/did-ion.spec.ts
+++ b/packages/dids/tests/did-ion.spec.ts
@@ -682,7 +682,7 @@ describe('DidIonMethod', () => {
       expect(resolutionResult.didDocumentMetadata.method).to.have.property('published', true);
     });
 
-    it('returns notFound error with unpublished short form ION DIDs', async() => {
+    it('returns internalError error with unpublished short form ION DIDs', async() => {
       const did = 'did:ion:EiBCi7lnGtotBsFkbI_lQskQZLk_GPelU0C5-nRB4_nMfA';
       const resolutionResult = await DidIonMethod.resolve({ didUrl: did });
 
@@ -690,7 +690,7 @@ describe('DidIonMethod', () => {
       expect(resolutionResult).to.have.property('didDocument');
       expect(resolutionResult).to.have.property('didDocumentMetadata');
 
-      expect(resolutionResult.didResolutionMetadata).to.have.property('error', 'notFound');
+      expect(resolutionResult.didResolutionMetadata).to.have.property('error', 'internalError');
     });
 
     it('resolves published long form ION DIDs', async() => {