Longshot here. Does anybody use Box ( https://en.wikipedia.org/wiki/Box_(company) ) along with ArcGIS Pro. My workplace hosts their entire file directory on Box, including GIS data and maps. It's a cloud service. The network is atrocious! Box is solid all-around, and my only issues occur when using ArcGIS Pro. 10 minutes to load up a project, outrageous amounts of data being sent and received, 5 minutes to add a field. Basicaly complete paralysis of ArcPro occurring regularly. If I work on my hard drive, problem solved.
Happy to provide more details or attempt diagnostics. General cloud-hosting experiences not box-specific are welcome as well.
Thanks!
Zach