Office 365 Groups change Primary SMTP Address

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Several settings can only be changed via PowerShell.

 One of this in Office 365 Unified Groups is the SMTP Primary Address.

 First you run PowerShell in Admin Mode and login to Exchange Online:
Set-ExecutionPolicy RemoteSigned
$credential = Get-Credential
Connect-MsolService -Credential $credential

loading the Exchange Online Module:

$exchangeSession = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri "https://outlook.office365.com/powershell-liveid/" -Credential $credential -Authentication "Basic" -AllowRedirection
Import-PSSession $exchangeSession -DisableNameChecking


 Next listing all your Office 365 Unified Groups:

Get-UnifiedGroup | fl name,alias,*smtp*

Once you identified the group, you change the SMTP:

Set-UnifiedGroup -Identity sfbusergroup-cologne -PrimarySmtpAddress sfbusergroup-nrw@skype4b-ug.de

Further more, you can change the all other attributes.
https://technet.microsoft.com/library/mt238274(v=exchg.160).aspx

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