How to create the Exchange Portal in SMA release 8.5
03/26/2020 
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DESCRIPTION:
In SMA 8.5, Application Offloading supports ActiveSync, Outlook Anywhere, Autodiscover, and OWA with one single portal. With the Exchange server as its backend server, the exchange portal has many specific settings. The Exchange Portal Wizard provides a convenient way to create the Exchange portal, and many specific options are configured automatically.
RESOLUTION:
Creating the Exchange Portal
Step 1. Type
The wizard starts by clicking Offload Web Application… on the Portal > Portals page. The first tab allows you to select a portal type. If “General” or “Load Balancing” is selected, one more option is displayed that reads, “This is an Exchange Portal which will be accessed by OWA, ActiveSync or Outlook Anywhere.”
Enable the option and click “Next”.
Step 2. Server
The second step is called “Server” which includes the Portal and Exchange Server settings.
Portal Name – The portal name should be unique to the identity of different portals.
Portal Domain Name - Enter the domain name used to access the offloading portal.
Portal Interface - indicates which network interface the portal will be bind to. If one specific network interface is selected, a new IP address should be assigned to the portal.
Portal Certificate - Lists all certificates that have been imported.
Exchange Server Address - Accepts settings about the Exchange Server, which can simply be the IP address of the Exchange Server. The scheme of the address is “https” by default. Port and default paths can also be set in this single field.
All these settings are verified instantly from the appliance when the mouse leaves the input textbox. The reason why the input fails appears. Only when all fields are satisfied, can you click “Next” to go to the third tab.
Step 3. Security
The third step includes the Security settings.
Allowed access method - Lists the methods that the portal has accessed, including “ActiveSync,” “Outlook Anywhere,” and “Outlook Web Access.” If one of these methods is disabled, one access policy is automatically generated to block that kind of access.
Enforce ActiveSync Provision - Provides a portal level option to enable or disable the ActiveSync Provision Settings. For more information about the “ActiveSync Provision,” See Device Management (or the PDA feature).
Enable Web Application Firewall - Can be enabled when WAF is licensed.
Disable Authentication Control - Cannot be enabled for the Exchange Portal.
Step 4. Miscellaneous
The fourth step includes the general portal settings.
The default values of Portal Site Title, Portal Banner Title, and Login Message are designed specifically for the Exchange Portal. They can also be customized.
Editing the Exchange Portal
All Exchange Portal settings can be viewed or edited by clicking Edit on portal list page.
On the General tab, “Enforce login uniqueness” is disabled by default, because ActiveSync or Outlook Anywhere client may not only use one session.
On the Offloading tab, “Enable Email Clients Authentication” is enabled if “Disable Authentication Control” is not selected. The “Default Domain Name” is set automatically when creating or editing a Domain.
On the Virtual Host tab, “Virtual Host Alias” is set to the Autodiscover address of ActiveSync if ActiveSync access has been enabled. The Autodiscover address is generated automatically from the Virtual Host Domain Name.
On the Logo tab, a Logo or Favicon can be customized for OWA access.
On the Services > Policies page, one or more policy can be added to deny a specific access method that was selected during the wizard. 
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