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Seems to be a network issue to me.
Ports 443,7080,80 should be open bi-directionally for Unity Subscriber as well towards Office 365.
Before all this, Make sure "Connection Mailbox Sync" is active and started on Unity Subscriber upon failover.
For a unique Port Group, you would see an option to create ports in the top right corner under "Related Links" --> "Add Ports".
It is recommended that you create unique port groups of each node in SCCP integration.
>>In case of Cluster, create two P...
I don't think there is any way to automate this option proactively (using smtp address as firstname.lastname@smtpdomain) using any template or query.Automated Design is to take alias@smtpdomain as default SMTP address.