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Office 365 group suffix email change?

Hi, I am trying to change all my group email suffixes in Office 365? For example, it's currently <some department@domain.org> and I'd like to change it where it displays in Outlook as <some department@domain2.org>. However I don't want to make this change for one department alone but for all departments past, present, and future moving forward.

I need to take these 2 scripts and make them iteratively for all my Office 365 groups moving forward.

PS C:\Users\david.shibuya> Set-UnifiedGroup -Identify Legal_team -Email Addresses @{add="legal_team@orbis.org"}

PS C:\Users\david.shibuya> Set-UnifiedGroup -Identify Legal_team -PrimarySmtpAddress legal_team@orbis.org

Vasil Michev (MVP)

Use an email address policy: https://docs.microsoft.com/en-us/office365/admin/create-groups/choose-domain-to-create-groups?view=o365-worldwide

orbisuser

ASKER

Hi Vasil,

What I actually need is a script that for each EXISTING Office 365 Group in Exchange Online, adds a SMTP mail address that uses the internal relay domain (@orbis.org), then sets that address as the primary SMTP address for the group. Is this possible and if so, how?

Vasil Michev (MVP)

Well you did say "moving forward". The cmdlets you have outlined above would do just fine for existing groups. Apart from that all you need is a simple filter to find the ones that currently have "incorrect" address.

orbisuser

ASKER

I'm looking for something like this:

$Groups = Get-UnifiedGroup where-object {$_.PrimarySMTPAddress -like "*@<old_domain>"

for Each $Group in $Groups

Set-unified group -EmailAddresses @{add="<alias>@<newdomain>"};
Set-unifiedGroup -PrimarySMTPAddress "<alias>@<new_domain>"

Is there a PowerShell expert that could review the syntax in this code? Specifically, how do you write a where-object cmdlet so that it matches PART of a string pattern, in this case, the old domain suffix for the Group email address.

orbisuser

ASKER

I think I pretty much have it:

$Groups = Get-UnifiedGroup | where {($_.PrimarySmtpAddress -match "<old_domain>")}
foreach ($Group in $Groups) {
>> $Alias = $Group.Alias
>> $Identity = $Group.Identity
>> $SMTP = $Alias + "@<new_domain>"
>> Set-Mailbox -Identity $Identity -EmailAddresses @{add="$SMTP"}
>> Set-Mailbox -Identity $Identity -PrimarySmtpAddress $SMTP
>>}

When I run this I'm getting the following error:

The operation couldn't be performed because object '$Identity' couldn't be found on
'<servername>.PROD.OUTLOOK.COM'.

It appears the Identity property is pulling a Guid of sorts, but even if I change the $Identity variable to collect the DisplayName or Alias property, it gives the same error.

Does somebody know why this happens?

ASKER CERTIFIED SOLUTION

orbisuser

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