Update Enable-OutlookAnywhere.md

Author: dariomws

exchange/exchange-ps/exchange/Enable-OutlookAnywhere.md

@@ -54,6 +54,8 @@ This cmdlet can be successfully run only if the RPC over HTTP proxy Windows netw
 
 When you run this cmdlet, it can take as long as an hour for the settings to become effective, depending on how long it takes for Active Directory to replicate.
 
+For more information about the different authentication methods that you can see in this article, see [Understanding HTTP Authentication](https://docs.microsoft.com/dotnet/framework/wcf/feature-details/understanding-http-authentication).
+
 You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see [Find the permissions required to run any Exchange cmdlet](https://docs.microsoft.com/powershell/exchange/find-exchange-cmdlet-permissions).
 
 ## EXAMPLES