Document required permission for Hazelcast Management Center (hazelca…

…st#1410)

docs/modules/security/pages/client-authorization.adoc

@@ -190,7 +190,9 @@ The following is the list of client permissions that can be configured on the me
 
 === All permissions
 
-The `<all-permissions>`` permission grants clients access to all data and features.
+`<all-permissions>` grants clients access to all data and features.
+The client specified in the following code example is used by Hazelcast Management Center when it connects to clusters.
+To learn more about this client, see xref:{page-latest-supported-mc}@management-center:ROOT:connecting-members.adoc[].
 
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@@ -221,10 +223,9 @@ all:
 
 === Management Permission
 
-The `<management-permission>`` permission defines which
-client principals/endpoints are allowed to perform management tasks.
-The client specified in the following code example is used by Hazelcast Management Center
-when it connects to clusters. To learn more about this client, see xref:{page-latest-supported-mc}@management-center:ROOT:connecting-members.adoc[].
+`<management-permission>` defines which client principals/endpoints are allowed to perform management tasks.
+
+WARNING: For Hazelcast Management Center to work properly, `management-permission` is not sufficient. `all-permissions` is required.
 
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