Merge pull request #282 from Chirouette/patch-6

Update tenant-allow-block-list-files-configure.md

Author: chrisda

defender-office-365/tenant-allow-block-list-files-configure.md

@@ -54,7 +54,12 @@ This article describes how admins can manage entries for files in the Microsoft
 - An entry should be active within 5 minutes.
 
 - You need to be assigned permissions before you can do the procedures in this article. You have the following options:
-  - [Microsoft Defender XDR Unified role based access control (RBAC)](/defender-xdr/manage-rbac) (If **Email & collaboration** \> **Exchange Online permissions** permissions is :::image type="icon" source="media/scc-toggle-on.png" border="false"::: **Active**. Affects the Defender portal only, not PowerShell): **Authorization and settings/Security settings/Detection tuning (manage)** or **Authorization and settings/Security settings/Core security settings (read)**.
+  - [Microsoft Defender XDR Unified role based access control (RBAC)](/defender-xdr/manage-rbac) (If **Email & collaboration** \> **Defender for Office 365** permissions is :::image type="icon" source="media/scc-toggle-on.png" border="false"::: **Active**. Affects the Defender portal only, not PowerShell): 
+    - *Add and remove entries from the Tenant Allow/Block List*: Membership assigned with the following permissions:
+      - **Authorization and settings/Security settings/Detection tuning (manage)**
+    - *Read-only access to the Tenant Allow/Block List*: 
+      - **Authorization and settings/Security settings/Read-only**.
+      - **Authorization and settings/Security settings/Core Security settings (read)**.
   - [Exchange Online permissions](/exchange/permissions-exo/permissions-exo):
     - _Add and remove entries from the Tenant Allow/Block List_: Membership in one of the following role groups:
       - **Organization Management** or **Security Administrator** (Security admin role).