• After August 31, 2016, Microsoft will pull the plug on code-based sandbox solutions for Office 365 and SharePoint Online. This means that the activation of new code-based sandbox solutions, as well as updates of existing solutions will no longer be available. Also, running code-based sandbox solutions in SharePoint Online multi-tenant environments will be disabled.

    What are sandbox solutions and why are they so important?

    Sandboxed solutions are packaged as a SharePoint solution package (.wsp files) that contains assemblies, other non-compiled components, and an XML manifest file and allow developers to do the following using custom code: