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SharePoint 2010 Cross-Farm Services And External Data Sources

There are several steps involved in the process of deploying cross farm services. Each step is very important to gain the overall results you are after.

Configuration of trusted farms ensures all of the farms that use exchanges can trust each other. Certificates have to be exported to a file. Make sure you back up that file before you connect to any of the cross farm services. Publishing service applications must be done before you will be able to successfully share it across farms. Connecting cross farm service applications provides a connection must be made to a service that is published by a remote farm. This will require the URL to be entered of the published service. This is going to be displayed when you publish it. The connection on the local farm has to be created so that it can be connected successfully to a service application for a remote farm.

Should there be two domains where the server farms are located, the User profile service application will require both of them to trust each other. With the Business Data Connectivity and Secure Store Service the domain of the publishing farm has to trust that of the consuming farm. None of the cross farm service applications are going to work if there isn’t a trust requirement in place for the two domains.

It is possible for certain service applications to access external data sources. This occurs through the access of a delegated Windows identity that will place some additional requirements on a given environment. These types of service applications have to be in the same domain as the SharePoint Server 2010 farm. This is where the service applications are housed. The other option is for the service application to be configured using the Secure Store Service.There are plenty of different service applications that can be found across the external data. They use a delegated Window identity. This includes:

  • Excel Services
  • InfoPath Forms Services
  • PerformancePoint Services
  • Visio Services

The service applications used to access external data sources must have a delegated Windows identity. Otherwise it has to be configured for the use of the Secure Store Service. This will store and maintain the credentials of a user or a service. When service applications are used to store credentials, they have to be authenticated before the data can be accessed.

If the external data sources aren’t within the same domain then authentication for the external data sources will fail unless you use the Secure Store Service. Farm servers can be split between two different domains but the application servers have to be found in the same domain as the external data sources.

There are several service applications and products that don’t have those requirements. They include:

  • Access Services
  • Business Data connectivity Services
  • Microsoft Business Connectivity Services
  • Microsoft Project Server 2010
  • Microsoft SQL Server PowerPivot for Microsoft SharePoint
  • Microsoft SQL Server Reporting Services
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