Office Web Apps with SharePoint 2013

Prerequisites to install Office Web Apps on a separate Server

1. Joint to Domain
2. Application Server and web Server Roles
3. .Net Framework 3.5 , 4.5 Features

Install Office Web Apps 

1. Run the setup 
2. Create a Farm by using power shell
3. New-OfficeWebAppsFarm -InternalURL http://ServerName -AllowHttp -EditingEnabledNote (You can configure -ExternalURL to access the site from load balance or from outside)
4. Open http://ServerName/hosting/discovery and if you get a result then every thing is Ok
   Note (to add a second server to Office Web Apps farm run the following after you install Office Web Apps New-OfficeWebAppsMachine -MachineTojoin "First Server FQDN Server Name" )
   
   

Integrate SharePoint 2013 with Office Web Apps

1. Open SharePoint Management Shell
2. Run the following :
3. New-SPWOPIBinding -ServerName officeWebAppsServerName.domain.local -AllowHttp
   Set-SPWOPIZone -Zone "internal-http" (because by default it's Https)
   $c = Get-SPSecurityTokeyServiceConfgi
   $c.AllowOAuthOverHttp = $true
   $c.Update()
4. Test it from SharePoint site.