diff --git a/sdk/identity/azure-identity/azure/identity/_credentials/vscode.py b/sdk/identity/azure-identity/azure/identity/_credentials/vscode.py
index b07d8e2d68e55..c9894f055abaf 100644
--- a/sdk/identity/azure-identity/azure/identity/_credentials/vscode.py
+++ b/sdk/identity/azure-identity/azure/identity/_credentials/vscode.py
@@ -19,7 +19,7 @@
 
 if TYPE_CHECKING:
     # pylint:disable=unused-import,ungrouped-imports
-    from typing import Any
+    from typing import Any, Iterable, Optional
     from azure.core.credentials import AccessToken
 
 
@@ -37,9 +37,9 @@ def __init__(self, **kwargs):
         # type: (**Any) -> None
         self._refresh_token = None
         self._client = kwargs.pop("_client", None)
+        self._tenant_id = kwargs.pop("tenant_id", None) or "organizations"
         if not self._client:
-            tenant_id = kwargs.pop("tenant_id", None) or "organizations"
-            self._client = AadClient(tenant_id, AZURE_VSCODE_CLIENT_ID, **kwargs)
+            self._client = AadClient(self._tenant_id, AZURE_VSCODE_CLIENT_ID, **kwargs)
 
     @log_get_token("VisualStudioCodeCredential")
     def get_token(self, *scopes, **kwargs):
@@ -56,6 +56,11 @@ def get_token(self, *scopes, **kwargs):
         if not scopes:
             raise ValueError("'get_token' requires at least one scope")
 
+        if self._tenant_id.lower() == "adfs":
+            raise CredentialUnavailableError(
+                message="VisualStudioCodeCredential authentication unavailable. ADFS is not supported."
+            )
+
         token = self._client.get_cached_access_token(scopes)
 
         if not token:
@@ -68,7 +73,7 @@ def get_token(self, *scopes, **kwargs):
         return token
 
     def _redeem_refresh_token(self, scopes, **kwargs):
-        # type: (Sequence[str], **Any) -> Optional[AccessToken]
+        # type: (Iterable[str], **Any) -> Optional[AccessToken]
         if not self._refresh_token:
             self._refresh_token = get_credentials()
             if not self._refresh_token:
diff --git a/sdk/identity/azure-identity/azure/identity/aio/_credentials/vscode.py b/sdk/identity/azure-identity/azure/identity/aio/_credentials/vscode.py
index 4043d54c0f1ed..16b338146d0a8 100644
--- a/sdk/identity/azure-identity/azure/identity/aio/_credentials/vscode.py
+++ b/sdk/identity/azure-identity/azure/identity/aio/_credentials/vscode.py
@@ -13,7 +13,7 @@
 
 if TYPE_CHECKING:
     # pylint:disable=unused-import,ungrouped-imports
-    from typing import Any
+    from typing import Any, Iterable, Optional
     from azure.core.credentials import AccessToken
 
 
@@ -30,9 +30,9 @@ class VisualStudioCodeCredential(AsyncContextManager):
     def __init__(self, **kwargs: "Any") -> None:
         self._refresh_token = None
         self._client = kwargs.pop("_client", None)
+        self._tenant_id = kwargs.pop("tenant_id", None) or "organizations"
         if not self._client:
-            tenant_id = kwargs.pop("tenant_id", None) or "organizations"
-            self._client = AadClient(tenant_id, AZURE_VSCODE_CLIENT_ID, **kwargs)
+            self._client = AadClient(self._tenant_id, AZURE_VSCODE_CLIENT_ID, **kwargs)
 
     async def __aenter__(self):
         if self._client:
@@ -60,6 +60,11 @@ async def get_token(self, *scopes, **kwargs):
         if not scopes:
             raise ValueError("'get_token' requires at least one scope")
 
+        if self._tenant_id.lower() == "adfs":
+            raise CredentialUnavailableError(
+                message="VisualStudioCodeCredential authentication unavailable. ADFS is not supported."
+            )
+
         token = self._client.get_cached_access_token(scopes)
         if not token:
             token = await self._redeem_refresh_token(scopes, **kwargs)
@@ -70,7 +75,7 @@ async def get_token(self, *scopes, **kwargs):
                 pass
         return token
 
-    async def _redeem_refresh_token(self, scopes: "Sequence[str]", **kwargs: "Any") -> "Optional[AccessToken]":
+    async def _redeem_refresh_token(self, scopes: "Iterable[str]", **kwargs: "Any") -> "Optional[AccessToken]":
         if not self._refresh_token:
             self._refresh_token = get_credentials()
             if not self._refresh_token:
diff --git a/sdk/identity/azure-identity/tests/test_vscode_credential.py b/sdk/identity/azure-identity/tests/test_vscode_credential.py
index 485ad9714562e..a0ce1a19d2716 100644
--- a/sdk/identity/azure-identity/tests/test_vscode_credential.py
+++ b/sdk/identity/azure-identity/tests/test_vscode_credential.py
@@ -159,3 +159,12 @@ def test_mac_keychain_error():
         credential = VisualStudioCodeCredential()
         with pytest.raises(CredentialUnavailableError):
             token = credential.get_token("scope")
+
+
+def test_adfs():
+    """The credential should raise CredentialUnavailableError when configured for ADFS"""
+
+    credential = VisualStudioCodeCredential(tenant_id="adfs")
+    with pytest.raises(CredentialUnavailableError) as ex:
+        credential.get_token("scope")
+    assert "adfs" in ex.value.message.lower()
diff --git a/sdk/identity/azure-identity/tests/test_vscode_credential_async.py b/sdk/identity/azure-identity/tests/test_vscode_credential_async.py
index 8084f35fae1ac..caf1c92a238d4 100644
--- a/sdk/identity/azure-identity/tests/test_vscode_credential_async.py
+++ b/sdk/identity/azure-identity/tests/test_vscode_credential_async.py
@@ -139,3 +139,13 @@ async def test_no_obtain_token_if_cached():
         credential = VisualStudioCodeCredential(_client=mock_client)
         token = await credential.get_token("scope")
         assert token_by_refresh_token.call_count == 0
+
+
+@pytest.mark.asyncio
+async def test_adfs():
+    """The credential should raise CredentialUnavailableError when configured for ADFS"""
+
+    credential = VisualStudioCodeCredential(tenant_id="adfs")
+    with pytest.raises(CredentialUnavailableError) as ex:
+        await credential.get_token("scope")
+    assert "adfs" in ex.value.message.lower()