Merge pull request #201448 from dlepow/patch-120

Update api-management-authentication-policies.md

Author: PRMerger4

articles/api-management/api-management-authentication-policies.md

@@ -154,14 +154,14 @@ Both system-assigned identity and any of the multiple user-assigned identities c
 ```
 
 ```xml
-<authentication-managed-identity resource="Client_id_of_Backend"/> <!--Your own Azure AD Application-->
+<authentication-managed-identity resource="AD_application_id"/> <!--Application (client) ID of your own Azure AD Application-->
 ```
 
 #### Use managed identity and set header manually
 
 ```xml
-<authentication-managed-identity resource="Client_id_of_Backend"
-   output-token-variable-name="msi-access-token" ignore-error="false" /> <!--Your own Azure AD Application-->
+<authentication-managed-identity resource="AD_application_id"
+   output-token-variable-name="msi-access-token" ignore-error="false" /> <!--Application (client) ID of your own Azure AD Application-->
 <set-header name="Authorization" exists-action="override">
    <value>@("Bearer " + (string)context.Variables["msi-access-token"])</value>
 </set-header>