diff --git a/.changeset/olive-ants-allow.md b/.changeset/olive-ants-allow.md
new file mode 100644
index 0000000000..569f2825da
--- /dev/null
+++ b/.changeset/olive-ants-allow.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-auth-backend': patch
+---
+
+Added extra configuration parameters for active directory file system identity
diff --git a/plugins/auth-backend/config.d.ts b/plugins/auth-backend/config.d.ts
index e1f927dd24..61bbe15d05 100644
--- a/plugins/auth-backend/config.d.ts
+++ b/plugins/auth-backend/config.d.ts
@@ -50,6 +50,8 @@ export interface Config {
         issuer: string;
         cert: string;
         privateKey?: string;
+        authnContext?: string[];
+        identifierFormat?: string;
         decryptionPvk?: string;
         signatureAlgorithm?: 'sha256' | 'sha512';
         digestAlgorithm?: string;
diff --git a/plugins/auth-backend/src/providers/saml/provider.ts b/plugins/auth-backend/src/providers/saml/provider.ts
index 21e6c9080d..e0e5fc8c8f 100644
--- a/plugins/auth-backend/src/providers/saml/provider.ts
+++ b/plugins/auth-backend/src/providers/saml/provider.ts
@@ -127,6 +127,8 @@ export const createSamlProvider = (
       issuer: config.getString('issuer'),
       cert: config.getString('cert'),
       privateCert: config.getOptionalString('privateKey'),
+      authnContext: config.getOptionalStringArray('authnContext'),
+      identifierFormat: config.getOptionalString('identifierFormat'),
       decryptionPvk: config.getOptionalString('decryptionPvk'),
       signatureAlgorithm: config.getOptionalString('signatureAlgorithm') as
         | SignatureAlgorithm