What is it? Microsoft has re-invented how third-party / custom-developed software can plug into SharePoint. Web part still remains; however Microsoft is pushing the new SharePoint App Model instead of web part. Apps are self-contained pieces of functionality that extends the capabilities of a SharePoint website. Apps will be executed outside the SharePoint Server, either in the on-premise server or in the Cloud based server. This makes Apps easier for installation & clean-up. A farm solution in SharePoint requires full trust whereas sandbox solutions are very restricted. In order to bridge this gap Microsoft has come up with this App model. Sandboxed Solutions are deprecated and new custom solutions should be provided through Apps. A new concept of App Store and App catalogue has been introduced for global and local app hosting respectively. Microsoft’s Motivation behind App Model SharePoint 2007 and SharePoint 2010 have gained large-scale adoption worldwi...
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