Microsoft has announced a new On-Premise Diagnostics (OPD) tool for Skype for Business Server.
OPD is a PowerShell based collection of diagnostic scenarios, analyzers, rules and insights for diagnosing common issues in Skype for Business 2015 and 2019 on-premises and hybrid environments.
Once installed you run it in PowerShell and are prompted to pick a technical area.
Then you are presented with a list of diagnostic scenarios. E.g. this is for the Federation area
Then you run a scenario
This tool comes from a great team and I know they are keen for you to test it and provide your feedback, you can email them directly at email@example.com . The email address is still being setup at time of writing, you can also feedback by commenting on the original blog from Corbin Meek here