New answers tagged exchange
Here's one solution (3rd party developer) : http://www.eastbanctech.com/conference-rooms-reservation-solution-for-sharepoint-integrating-sharepoint-with-exchange/
You cannot see SPO site mailboxes through Exchange panel or by writing get-mailbox. They are visible as users in Azure. The naming is also by design (you should have Prefix-Site@domain.onmicrosoft.com, with "SMO-" being the default prefix). You can change it with Powershell or Site Mailbox Provisioning Policy: ...
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