Add metadata to solution guidance articles

Author: VesaJuvonen

docs/solution-guidance/security-apponly-azureacs.md

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+---
+title: Granting access using SharePoint App-Only
+description: Granting access using SharePoint App-Only
+ms.date: 12/12/2018
+ms.prod: sharepoint
+author: vesajuvonen
+ms.author: vesaj
+ms.topic: sharepoint
+localization_priority: normal
+---
+
 # Granting access using SharePoint App-Only
 SharePoint App-Only is the older, but still very relevant, model of setting up app-principals. This model works for both SharePoint Online and SharePoint 2013/2016 on-premises and is ideal to prepare your applications for migration from SharePoint on-premises to SharePoint Online. Below steps show how to setup an app principal with tenant full control permissions, but obviously you could also grant just read permissions using this approach.
 

docs/solution-guidance/security-apponly-azuread.md

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+---
+title: Granting access via Azure AD App-Only
+description: Granting access via Azure AD App-Only
+ms.date: 12/12/2018
+ms.prod: sharepoint
+author: vesajuvonen
+ms.author: vesaj
+ms.topic: sharepoint
+localization_priority: normal
+---
+
 # Granting access via Azure AD App-Only
 
 When using SharePoint Online you can define applications in Azure AD and these applications can be granted permissions to SharePoint, but also to all the other services in Office 365. This model is the preferred model in case you’re using SharePoint Online, if you’re using SharePoint on-premises you have to use the SharePoint Only model via based Azure ACS as described in [here](security-apponly-azureacs.md).

docs/solution-guidance/security-apponly.md

@@ -1,3 +1,14 @@
+---
+title: Accessing SharePoint using an application context, also known as app-only
+description: Accessing SharePoint using an application context, also known as app-only
+ms.date: 12/12/2018
+ms.prod: sharepoint
+author: vesajuvonen
+ms.author: vesaj
+ms.topic: sharepoint
+localization_priority: normal
+---
+
 # Accessing SharePoint using an application context, also known as app-only
 
 There are two approaches for doing app-only for SharePoint: 

docs/solution-guidance/security-webapppolicies.md

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+---
+title: Alternative model for web app policies in SharePoint Online
+description: Alternative model for web app policies in SharePoint Online
+ms.date: 12/12/2018
+ms.prod: sharepoint
+author: vesajuvonen
+ms.author: vesaj
+ms.topic: sharepoint
+localization_priority: normal
+---
+
 # Alternative model for web app policies in SharePoint Online
 
 Web app policies are a concept that allows SharePoint administrators to either grant or deny permissions to users and groups for all sites under a web application. These permission grants and denies take preference over the permissions set at the sites in the web application and therefore are a mechanism typically used in scenarios like these: