Add prerequisite for app management policies in Entra Kerberos

Author: MaximeKjaer

articles/storage/files/storage-files-identity-auth-hybrid-identities-enable.md

@@ -44,6 +44,8 @@ You need the following minimum prerequisites. Without these prerequisites, you c
 
 - You must disable multifactor authentication (MFA) on the Entra app representing the storage account. For instructions, see [Disable multifactor authentication on the storage account](#disable-multifactor-authentication-on-the-storage-account).
 
+- If you have [application management policies](/entra/identity/enterprise-apps/configure-app-management-policies) that block symmetric key addition on service principals, or that restrict service principal symmetric key lifetime to a value less than 366 days, you will need to [adjust the policy](/entra/identity/enterprise-apps/configure-app-management-policies#enable-a-restriction-for-all-applications) or [grant an exception](/entra/identity/enterprise-apps/configure-app-management-policies#grant-an-exception-to-a-user-or-service) for the "Storage Resource Provider" service (app ID `a6aa9161-5291-40bb-8c5c-923b567bee3b`). If using the [Entra Admin Center](https://aka.ms/app-mgmt-policy-ux), these policies are defined in the "Block password addition" and "Restrict max password lifetime" settings. If using the [Graph API](/graph/api/resources/tenantappmanagementpolicy), these policies are defined in `symmetricKeyAddition` and `symmetricKeyLifetime` restrictions on `servicePrincipalRestrictions.passwordCredentials`.
+
 - This feature currently doesn't support cross-tenant access for B2B users or guest users. Users from an Entra tenant other than the one configured won't be able to access the file share.
 
 - With Microsoft Entra Kerberos, the Kerberos ticket encryption is always AES-256. But you can set the SMB channel encryption that best fits your needs.