remove 'aad' from screenshots and add period to alt-text

Author: terencefan

articles/azure-signalr/howto-disable-local-auth.md

@@ -30,7 +30,7 @@ In this section, you will learn how to use the Azure portal to disable local aut
 
 4. Click **Save** button.
 
-![Screenshot of disabling local auth](./media/howto-disable-local-auth/disable-local-auth.png)
+![Screenshot of disabling local auth.](./media/howto-disable-local-auth/disable-local-auth.png)
 
 ## Use Azure Resource Manager template
 
@@ -110,7 +110,7 @@ You can disable local authentication by setting `disableLocalAuth` property to t
 
 You can assign the [Azure SignalR Service should have local authentication methods disabled](https://ms.portal.azure.com/#view/Microsoft_Azure_Policy/PolicyDetailBlade/definitionId/%2Fproviders%2FMicrosoft.Authorization%2FpolicyDefinitions%2Ff70eecba-335d-4bbc-81d5-5b17b03d498f) Azure policy to an Azure subscription or a resource group to enforce disabling of local authentication for all SignalR resources in the subscription or the resource group.
 
-![Screenshot of disabling local auth policy](./media/howto-disable-local-auth/disable-local-auth-policy.png)
+![Screenshot of disabling local auth policy.](./media/howto-disable-local-auth/disable-local-auth-policy.png)
 
 ## Next steps
 

articles/azure-signalr/media/signalr-howto-authorize-application/application-overview.png

@@ -24,14 +24,14 @@ The first step is to register an Azure application.
 2. Under **Manage** section, select **App registrations**.
 3. Select **New registration**.
 
-    ![Screenshot of registering an application](./media/signalr-howto-authorize-application/register-an-application.png)
+    ![Screenshot of registering an application.](./media/signalr-howto-authorize-application/register-an-application.png)
 
 4. Enter a display **Name** for your application.
 5. Select **Register** to confirm the register.
 
 Once you have your application registered, you can find the **Application (client) ID** and **Directory (tenant) ID** under its Overview page. These GUIDs can be useful in the following steps.
 
-![Screenshot of an application](./media/signalr-howto-authorize-application/application-overview.png)
+![Screenshot of an application.](./media/signalr-howto-authorize-application/application-overview.png)
 
 To learn more about registering an application, see
 - [Quickstart: Register an application with the Microsoft identity platform](../active-directory/develop/quickstart-register-app.md).
@@ -47,7 +47,7 @@ The application requires a client secret to prove its identity when requesting a
 
 1. Under **Manage** section, select **Certificates & secrets**
 1. On the **Client secrets** tab, select **New client secret**.
-![Screenshot of creating a client secret](./media/signalr-howto-authorize-application/new-client-secret.png)
+![Screenshot of creating a client secret.](./media/signalr-howto-authorize-application/new-client-secret.png)
 1. Enter a **description** for the client secret, and choose a **expire time**.
 1. Copy the value of the **client secret** and then paste it to a secure location. 
     > [!NOTE]
@@ -57,7 +57,7 @@ The application requires a client secret to prove its identity when requesting a
 
 You can also upload a certification instead of creating a client secret.
 
-![Screenshot of uploading a certification](./media/signalr-howto-authorize-application/upload-certificate.png)
+![Screenshot of uploading a certification.](./media/signalr-howto-authorize-application/upload-certificate.png)
 
 To learn more about adding credentials, see
 

articles/azure-signalr/media/signalr-howto-authorize-application/new-client-secret.png

@@ -26,7 +26,7 @@ This example shows you how to configure `System-assigned managed identity` on a
 1. Open [Azure portal](https://portal.azure.com/), Search for and select a Virtual Machine.
 1. Under **Settings** section, select **Identity**.
 1. On the **System assigned** tab, toggle the **Status** to **On**.
-   ![Screenshot of an application](./media/signalr-howto-authorize-managed-identity/identity-virtual-machine.png)
+   ![Screenshot of an application.](./media/signalr-howto-authorize-managed-identity/identity-virtual-machine.png)
 1. Select the **Save** button to confirm the change.
 
 

articles/azure-signalr/media/signalr-howto-authorize-application/upload-certificate.png

@@ -23,14 +23,14 @@ The first step is to register an Azure application.
 2. Under **Manage** section, select **App registrations**.
 3. Click **New registration**.
 
-    ![Screenshot of registering an application](./media/howto-authorize-from-application/register-an-application.png)
+    ![Screenshot of registering an application.](./media/howto-authorize-from-application/register-an-application.png)
 
 4. Enter a display **Name** for your application.
 5. Click **Register** to confirm the register.
 
 Once you have your application registered, you can find the **Application (client) ID** and **Directory (tenant) ID** under its Overview page. These GUIDs can be useful in the following steps.
 
-![Screenshot of an application](./media/howto-authorize-from-application/application-overview.png)
+![Screenshot of an application.](./media/howto-authorize-from-application/application-overview.png)
 
 To learn more about registering an application, see
 - [Quickstart: Register an application with the Microsoft identity platform](../active-directory/develop/quickstart-register-app.md).
@@ -45,7 +45,7 @@ The application requires a client secret to prove its identity when requesting a
 
 1. Under **Manage** section, select **Certificates & secrets**
 1. On the **Client secrets** tab, click **New client secret**.
-![Screenshot of creating a client secret](./media/howto-authorize-from-application/new-client-secret.png)
+![Screenshot of creating a client secret.](./media/howto-authorize-from-application/new-client-secret.png)
 1. Enter a **description** for the client secret, and choose a **expire time**.
 1. Copy the value of the **client secret** and then paste it to a secure location. 
     > [!NOTE]
@@ -54,7 +54,7 @@ The application requires a client secret to prove its identity when requesting a
 
 You can also upload a certification instead of creating a client secret.
 
-![Screenshot of uploading a certification](./media/howto-authorize-from-application/upload-certificate.png)
+![Screenshot of uploading a certification.](./media/howto-authorize-from-application/upload-certificate.png)
 
 To learn more about adding credentials, see
 
@@ -74,15 +74,15 @@ This sample shows how to assign a `Web PubSub Service Owner` role to a service p
 
    The following screenshot shows an example of the Access control (IAM) page for a Web PubSub resource.
 
-   ![Screenshot of access control](./media/howto-authorize-from-application/access-control.png)
+   ![Screenshot of access control.](./media/howto-authorize-from-application/access-control.png)
 
 1. Click **Add > Add role assignment**.
 
 1. On the **Roles** tab, select `Web PubSub Service Owner`.
 
 1. Click **Next**.
 
-   ![Screenshot of adding role assignment](./media/howto-authorize-from-application/add-role-assignment.png)
+   ![Screenshot of adding role assignment.](./media/howto-authorize-from-application/add-role-assignment.png)
 
 1. On the **Members** tab, under **Assign access to** section, select **User, group, or service principal**.
 
@@ -94,7 +94,7 @@ This sample shows how to assign a `Web PubSub Service Owner` role to a service p
 
 4. Click **Next**.
 
-   ![Screenshot of assigning role to service principals](./media/howto-authorize-from-application/assign-role-to-service-principals.png)
+   ![Screenshot of assigning role to service principals.](./media/howto-authorize-from-application/assign-role-to-service-principals.png)
 
 5. Click **Review + assign** to confirm the change.
 

articles/azure-signalr/media/signalr-howto-authorize-managed-identity/identity-virtual-machine.png

@@ -23,7 +23,7 @@ This is an example for configuring `System-assigned managed identity` on a `Virt
 1. Open [Azure portal](https://portal.azure.com/), Search for and select a Virtual Machine.
 1. Under **Settings** section, select **Identity**.
 1. On the **System assigned** tab, toggle the **Status** to **On**.
-   ![Screenshot of virtual machine - identity](./media/howto-authorize-from-managed-identity/identity-virtual-machine.png)
+   ![Screenshot of virtual machine - identity.](./media/howto-authorize-from-managed-identity/identity-virtual-machine.png)
 1. Click the **Save** button to confirm the change.
 
 ### How to create user-assigned managed identities
@@ -57,15 +57,15 @@ This sample shows how to assign a `Web PubSub Service Owner` role to a system-as
 
    The following screenshot shows an example of the Access control (IAM) page for a Web PubSub resource.
 
-   ![Screenshot of access control](./media/howto-authorize-from-managed-identity/access-control.png)
+   ![Screenshot of access control.](./media/howto-authorize-from-managed-identity/access-control.png)
 
 1. Click **Add > Add role assignment**.
 
 1. On the **Roles** tab, select `Web PubSub Service Owner`.
 
 1. Click **Next**.
 
-   ![Screenshot of adding role assignment](./media/howto-authorize-from-managed-identity/add-role-assignment.png)
+   ![Screenshot of adding role assignment.](./media/howto-authorize-from-managed-identity/add-role-assignment.png)
 
 1. On the **Members** tab, under **Assign access to** section, select **Managed identity**.
 
@@ -79,7 +79,7 @@ This sample shows how to assign a `Web PubSub Service Owner` role to a system-as
 
 2. Click **Next**.
 
-   ![Screenshot of assigning role to managed identities](./media/howto-authorize-from-managed-identity/assign-role-to-managed-identities.png)
+   ![Screenshot of assigning role to managed identities.](./media/howto-authorize-from-managed-identity/assign-role-to-managed-identities.png)
 
 3. Click **Review + assign** to confirm the change.