Managing Office 365 Groups With Remote PowerShell – C7 Solutions

O365 groups info and latest update on features from MS

https://blogs.office.com/2016/02/17/updates-to-office-365-groups/
is the latest update to features here.

Managing Office 365 Groups With Remote PowerShell – C7 Solutions:

To add email aliases to O365 groups use...

Set-UnifiedGroup name -EmailAddresses @{Add="name@domain.com"}

Although a central group creation policy for a prefix or suffix seems to affect all Groups, in fact is it only applicable for user created groups – not admin created groups. The prefix is only added when users create groups via Outlook/OWA and not admins via ECP.