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Not just SharePoint, but you can’t install Office Web App 2013 on servers where any one of this product is installed: SharePoint, Exchange, Lync, SQL Server, Microsoft Office, Any server with web services running on Port 80/443! Add server roles, services and features Your SharePoint Web Application must be using Claims Authentication!
If you log on to SharePoint 2013 by using the System Account, you won’t be able to test the connection between SharePoint 2013 and Office Web Apps Server. Log on with a different account to test the connection. Low memory conditions can cause Office document previews to fail in Office Web Apps.
How to open office web apps using client applications?
Tip: To open Office documents using client applications (if installed) click on “Edit” link from Call-out menu or “Edit Document” button from Ribbon! If you have .NET Framework 3.5 installed already, you may get: HTTP Error 500.21 – Internal Server Error” at verifying Office web apps step.
How to connect SharePoint web application to Owa server?
Make sure OWA Server is able to connect with SharePoint Web Application by hitting SharePoint Web Application URL in browser from OWA Sever. In case of HTTPS, make sure your certificates are placed under “Trusted Certificate Authority” of OWA Server as well. OWA doesn’t work when you login using “System Account”
The following post shows how to set up the Office Web Apps Server and configure SharePoint 2013 to use the Office Web Apps Server. On VNGWIN2012, running the Office Web Apps Server:
How to create an office web apps server?
Use the New-OfficeWebAppsFarm command to create a new Office Web Apps Server farm that consists of a single server, as shown in the following example. –InternalURL is the name of the server that runs Office Web Apps Server, such as http://servername. –AllowHttp configures the farm to use HTTP.
How to deploy Office Web Apps server farm?
Deploy a multi-server, load-balanced Office Web Apps Server farm that uses HTTPS 1 Create the Office Web Apps Server farm on the first server 2 Add more servers to the farm 3 Verify that the Office Web Apps Server farm was created successfully 4 Configure the host