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Dear Staff, I configured the Lync Online settings to provide external connectivity to the domain.
Unfortunately, it is still disconnected from external domains and I can't let the company communicate to other O365 organizations. Can you help me?
I understand you prefer to communicate with external organization through Lync Online.
You can follow the steps of this link to enable the Lync Online federation.
Then, you can refer to this article to enable federation of the on-premise Lync server.
How are things going?
If you have any other questions or concerns, please do not hesitate to contact us. It is always our pleasure to be of assistance.