Powershell script to create an shared mailbox in hybid

Question

Hi,

I like to use an script to create an shared mailbox in exchange hybid

We have Exchange 2016 on-prem server and Exchange online

I have following script but it doesnt assign an permission

$DisplayName = Read-Host "Enter Shared Mailbox Name"
$UPN = $DisplayName -replace "#|-|\s+",""
$SamAccount = $UPN.Substring(0, [Math]::Min($UPN.Length, 20))
$Alias = $DisplayName -replace "#|-",""
$Alias = $Alias -replace "\s+","_"
$GroupName = ("SM_" + $Alias)

    
$OUSharedSMG = "Shared Mailbox group"
$OUSharedMail = "Shared Mailbox (Accounts)"

$group = New-DistributionGroup -Type Security -OrganizationalUnit $OUSharedSMG -Name $GroupName
if($group) { Set-DistributionGroup $GroupName -HiddenFromAddressListsEnabled $true }

# Create mailbox
$mailbox = New-RemoteMailbox -Name $DisplayName -Alias $Alias -OnPremisesOrganizationalUnit $OUSharedMail -Shared -UserPrincipalName "$UPN" `
-SamAccountName $SamAccount

Add-MailboxPermission -Identity $Alias `
-User $GroupName -AccessRights FullAccess -InheritanceType All

Answer 1

Hello @lalajee

i believe u are looking for this.

# Connect to Exchange on-premises
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http://<your on-premises Exchange server>/PowerShell/ -Authentication Kerberos
Import-PSSession $Session

# Prompt for shared mailbox name and member email addresses
$SharedMailboxName = Read-Host "Enter the name of the shared mailbox"
$MemberEmails = Read-Host "Enter the email addresses of the members separated by a semicolon (;)"

# Create shared mailbox on-premises
New-Mailbox -Name $SharedMailboxName -Alias $SharedMailboxName -Shared

# Add members to shared mailbox on-premises
$MemberEmailsArray = $MemberEmails.Split(';')
ForEach ($MemberEmail in $MemberEmailsArray) {
    Add-MailboxPermission -Identity $SharedMailboxName -User $MemberEmail -AccessRights FullAccess -InheritanceType All
}

# Synchronize shared mailbox to Exchange Online
New-MoveRequest -Identity $SharedMailboxName -RemoteLegacy -RemoteGlobalCatalog "<your on-premises domain controller>" -TargetDeliveryDomain "<your domain>.onmicrosoft.com" -TargetDatabase "<your on-premises mailbox database>"

# Disconnect from Exchange on-premises
Remove-PSSession $Session

I hope this is work for u.

and please, don`t forget to upvote if this help u.

Regards

Answer 2

If you are creating a remote shared mailbox, then you will need to connect to Exchange Online to set the perms:

so for your menu, you will want to install the Exchange Online Module, then run

Add-MailboxPermission -Identity $Alias ` -User $GroupName -AccessRights FullAccess -InheritanceType All

https://learn.microsoft.com/en-us/powershell/exchange/connect-to-exchange-online-powershell?view=exchange-ps#step-1-load-the-exchange-online-powershell-module

You can use a prefix to ensure it doesnt conflict with on-prem Exchange powershell

Example: Connect-ExchangeOnline -prefix "365"

Then the command in your menu is:

Add-365MailboxPermission -Identity $Alias ` -User $GroupName -AccessRights FullAccess -InheritanceType All

https://learn.microsoft.com/en-us/powershell/module/exchange/connect-exchangeonline?view=exchange-ps