[O365] Change/remove groups and teams SMTP addresses

• List all groups and their addresses:

Get-UnifiedGroup | fl alias,*primary*,*emailadd* 

• Change primary SMTP

Get-UnifiedGroup group1 | Set-UnifiedGroup -PrimarySmtpAddress group1@newdomain.tech

• Remove SMTP address from old domain:

Get-UnifiedGroup group1 | Set-UnifiedGroup -EmailAddresses @{remove="group1@olddomain.com"}

• List group addresses:

Get-UnifiedGroup group1 | fl alias,*primary*,*emailadd*