On-Premises Diagnostics for Skype for Business Server Are Now Available

It would be interesting to see how does it work, but after Easter 🙂

Did I misread it, or where it should be running? On-prem workstation or server? Outside network?

Support for MFA is highly appreciated in here as well. Or can I e.g. open the sessions to tenant using SfB online module, and then run this?

Do you have any requirements needed to run this? Does it run by its own, or is the some PS modules required as well? Found this: SfB OPD Readme 

You seems to be marking (on your example) with an error if "Remote User Access is disabled" on Edge pool. But you were analyzing federation issue. On set-CSExternalAccessPolicy have different configurations for remote use and federations. Or did I misunderstood this somehow, as I have not tested this yet? 🙂