Isn't that law that you referred to in the uservoice only for calls that are going to be billed? "Each carrier that offers or bills toll telephone service". Internal calls within Teams are not charged, those are free calls.

 

I know that some of the software developers doing reporting systems for Skype for Business been trying to use Get-CsUserSession  to export session and save in a separate database but I think they are waiting for real API for this.

 

Dynamic Routing, do you mean Direct Routing? If you are using your own SBC you can use the CDR for that, but that will only be for calls that go out to your PSTN carrier.

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