System Requirements

Office Web Apps Server must be installed on a separate system in the environment, because it cannot be collocated with any of the Lync Server roles. High-availability is also supported for Office Web Apps Server and can be implemented via the installation of multiple servers and use of a hardware or software load-balancing solution. Whether a single system or multiple systems are deployed, each installation is referred to as an Office Web Apps Server farm. The following requirements and guidelines apply for systems used to host Office Web Apps Server:

• Supported operating systems are Windows Server 2008 R2 SP1 and Windows Server 2012.

• Minimum hardware requirements are 4 x 64-bit cores, 8GB RAM, 80GB system hard drive.

• Server virtualization is supported.

• No other applications can be installed on the system, including any Lync roles, SQL, and Microsoft Office.

• For multiple server farms, any software or hardware load-balancing solution can be used.

A server certificate is also required in order to use Lync Server 2013 with Office Web Apps Server. The following requirements apply to the certificate that will be used:

• The certificate must be issued by a trusted CA (either internal or third-party).

• For single-server installations, the FQDN of the Office Web Apps Server must be included in the SAN (subject alternative name) field of the certificate.

• For load-balanced server farms, the certificate must be imported into the load balancer.

• The certificate must have an exportable private key.

• The Friendly name applied to the certificate must be unique within the Trusted Root Certificate Authorities store on the system running Office Web Apps Server, as this allows the cmdlet to determine which certificate is being targeted.

Note

Standard procedures can be used to request and install the certificate used for the Office Web Apps Server using the IIS Management Console, Certificate Authority Web Enrollment, or another method. However, the certificate binding should not be performed using the IIS Management Console. Rather, the certificate binding for Office Web Apps Server is performed using the same PowerShell command used to create the farm (New-OfficeWebAppsFarm), as detailed later.

Browser support for Office Web Apps Server includes Internet Explorer 6 through 9, as well as the latest public release versions of Google Chrome, Mozilla Firefox, and Apple Safari. There are also language packs available for English, Japanese, and Spanish, which must be installed on the Lync Front End Server as well as the Office Web Apps Server to be used.

The following are prerequisites for the installation of Office Web Apps Server:

• .NET Framework 4.5 (included with Windows Server 2012)

• Windows PowerShell 3.0 (included with Windows Server 2012)

• Windows Update KB2592525 (Windows Server 2008 R2 only)

• The Web Server (IIS) server role, along with the following role services:

Static Content

Default Document

ASP.NET (Windows Server 2008 R2) or ASP.NET 4.5 (Windows Server 2012)

.NET Extensibility (Windows Server 2008 R2) or .NET Extensibility 4.5 (Windows Server 2012)

ISAPI Extensions

ISAPI Filters

Server Side Includes

Windows Authentication

Request Filtering

IIS Management Console

Static Content Compression (recommended)

Dynamic Content Compression (recommended)

• The Ink and Handwriting Services feature

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