This thesis considers Microsoft BizTalk Server in a multitenant environment. The thesis does not consider integrated systems, customers or the infrastructure required by the integration platform. The outcome of the thesis is that Microsoft BizTalk Server may be used in a multitenant manner. The licence agreement does not restrict the use of the product from the multitenancy point of view. On the one hand, the challenges of the multitenant architecture are associated with security and transparency of the shared integration platform. Another challenge is to gain profit from a business aspects' point of view.