• Retain control over operations: Your IT team retains full control of all administrative access – including access to tools and services provided by outside vendors. You can choose which areas of operations you want to streamline through third-party input and direct the rest toward your internal staff.

• Less Responsibility To Manage: Hiring an outside company to provide services can save you money and time. When you outsource your IT needs, you no longer have to worry about managing employees, training them, or providing benefits. Outsourcing also allows you to focus on what you do best &; running your business. By outsourcing your IT needs, you can scale quickly if needed.
• Keep Up With Trends: Keep up with IT trends, including security, technology, and the latest developments in business applications. Train your employees to understand these new technologies without additional time and resources.

More info: How to Write an Effective Resignation Letter