But for this to work the Visio files needs to be stored in SharePoint or OneDrive.
When you have implemented the WOPI protocol you are able to view documents using Visio online that are stored in a third party database (https://wopi.readthedocs.io/en/latest/).
vanaja nsr commented
IT specialists participate in the design, operation and maintenance of IT systems used by companies of all types, as well as by public sector institutions. They take care of everything from hardware and software to networks and web resources.