Just wanted to chime back in here.
A lot of time has passed since I posted my method of inserting a credential into the Local System account for NAS access using psexec and I still find it to have worked flawlessly long-term. I've not had a problem in what feels like a year or more.
I worry...
I thought I would add my experience with this. The fixes above will work but I didn't find this place first. I also think I like my way better than running the application under a service account it wasn't necessarily designed to use, so I'll add it here.
First of all, Blue Iris should...