Lync onpremise, exchange online and UM ports requirement

Hello Team,
Could you, please point us to the relevant articles or answer my question in the email.
For the scenario with Lync on-premises and Exchange on-premises there is a requirement to have 60000-64000 ports open between Lync client and UM server in both directions for
SRTP/RTCP traffic. Our questions are:
1.
What are ports requirements for Lync 2013 on-premises with Exchange UM in Office 365?
2.
How to limit ports used by client for UM traffic? (is it with
Set-CsConferencingConfiguration?_
Please advise. MANY THANKS.

Hi SBHV,
As far as I know, it does not require special port.
You need to configure the Edge Server for federation, because the traffic will through Edge.
60000-64000 ports won’t be used in this case, they are used with on-premises.
Best regards,
Eric

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Lync onpremise, exchange online and UM ports requirement

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