Actually I have no idea how this works, probably I need to investigate deeper, but now I have not enough time tor that. So the issue was with the search, like here or here. Search simply was not working. I ran win10 + Visio 2016 pro, all x64. I downloaded Azure and AWS stencils, put them to My Shapes folder under Documents and it did not work.
I spent huge amount of time poking around, I was rebuilding indexes, restarting services, copying files. I even looked into the index with PowerShell. Files were there but Indexing did not work. And as last resort I just copied and pasted all the files inside of the same directory: C:\Program Files\Microsoft Office\root\Office16\Visio Content\1033. And suddenly it worked!
So the workaround was to:
- Copy all stencil files you need to a C:\Program Files\Microsoft Office\root\Office16\Visio Content\1033
- Select them all, copy (CTRL+C) and paste (CTRL+V) them once again in the same directory
And they immediately appeared in the search! Don’t ask me why.
One more location i’ve found is here C:\Program Files\MSOffice\Office16\Visio Content\1033
But still there are some issues. Just realized that not all files have been indexed. So, give it a try anyway!