Download from here;
https://github.com/sandroasp/Microsoft-Integration-and-Azure-Stencils-Pack-for-Visio
After download, do this;
Copy to the folder “%USERPROFILE%\Documents\My Shapes” (“C:\Users\you_user\Documents\My Shapes”; that is the default folder for the Visio custom shapes)
To access the shapes in Visio, select the Shapes Windows:
“More Shapes -> My Shapes -> Microsoft Integration Stencils v#.#”
“More Shapes -> My Shapes -> MIS Apps and Systems Logo Stencils v#.#”
“More Shapes -> My Shapes -> MIS IoT Devices Stencils v#.#”
“More Shapes -> My Shapes -> MIS Support Stencils v#.#”