Update secure-with-access.mdx

Clarifying actual feature availability for SaaS custom hostnames

Author: pew

src/content/docs/cloudflare-for-platforms/cloudflare-for-saas/security/secure-with-access.mdx

@@ -18,6 +18,6 @@ Cloudflare Access provides visibility and control over who has access to your [c
 
 ## Setup
 
-1. In [Zero Trust](https://one.dash.cloudflare.com/), create an Access [self-hosted application](/cloudflare-one/applications/configure-apps/self-hosted-apps/). Access applications can only be configured for custom hostnames owned within the same account. Access applications cannot be configured in the SaaS provider's account at this time.
+1. In [Zero Trust](https://one.dash.cloudflare.com/), create an Access [self-hosted application](/cloudflare-one/applications/configure-apps/self-hosted-apps/). Access applications can only be set up for custom hostnames owned by the SaaS domain’s account. The SaaS domain and custom hostname domains must be in separate Cloudflare accounts to configure access applications.
 2. In the **Domain** field, enter the custom hostname (for example, `mycustomhostname.com`). The custom hostname will not appear in the dropdown and must be manually entered.
 3. Follow the remaining self-hosted application creation steps to publish the application.