created an Exchange Online mailbox to appear in on-prem EAC
Run these commands on your on-premise exchange management shell
Enable-MailUser -Identity –ExternalEmailAddress <onmicrosoft.com email address>
Enable-RemoteMailbox
created an Exchange Online mailbox to appear in on-prem EAC
Run these commands on your on-premise exchange management shell
Enable-MailUser -Identity –ExternalEmailAddress <onmicrosoft.com email address>
Enable-RemoteMailbox