Even if you choose IT infrastructure outsource, you need to be aware of the challenges that you can expect along the way of infrastructure modernization:
Legacy devices. This is one of the main problems in upgrading since such devices cannot be integrated with modern software.
Lack of integration. More often than not, an IT infrastructure is a hodgepodge of features and technologies provided by different vendors, each with their own software.
Increasing complexity. Modern IT infrastructure schemes are not always clear and accessible to people used to old options, and sometimes engineers do not have the technology to adapt to advanced intelligent systems.