Microsoft Office 365 integrates natively with other Microsoft applications such as Azure, SharePoint, Viva, Dynamics 365, Power BI, Project Online and more. It can also easily integrate with other third-party applications or any on-premises business application you are using with a little help from Power Platform. 

If you are looking to integrate your existing systems to Office 365, there are many ways to do this. The most common is via web services.

Contact us to talk more about your specific requirements so we can best guide you on the approach to be taken and any limitations you may need to consider.