Merge pull request #64012 from dfitzmau/OCPBUGS-17814-new

OCPBUGS#17814-New: Removed administerXpn statement from GCP docs

Author: ShaunaDiaz

modules/minimum-required-permissions-ipi-gcp-xpn.adoc

@@ -8,9 +8,14 @@
 
 When you are installing a cluster to a link:https://cloud.google.com/vpc/docs/shared-vpc[shared VPC], you must configure the service account for both the host project and the service project. If you are not installing to a shared VPC, you can skip this section.
 
-You must apply the minimum roles required for a standard installation as listed above, to the service project. Note that custom roles, and therefore fine-grained permissions, cannot be used in shared VPC installations because GCP does not support adding the required permission `compute.organizations.administerXpn` to custom roles.
+You must apply the minimum roles required for a standard installation as listed above, to the service project.
 
-In addition, the host project must apply one of the following configurations to the service account:
+[IMPORTANT]
+====
+You can use granular permissions for a Cloud Credential Operator that operates in either manual or mint credentials mode. You cannot use granular permissions in passthrough credentials mode.
+====
+
+Ensure that the host project applies one of the following configurations to the service account:
 
 .Required permissions for creating firewalls in the host project
 [%collapsible]