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TH_'s avatar
TH_
Copper Contributor
Feb 15, 2022
Solved

Forward rule for all users

Hi everyone,   Looking for a clever way to set up a forward rule (all incoming traffic) for all our users from one tenant to another due to a recent acquisition. Was wondering if anyone knows of a ...
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office 365
  • VasilMichev's avatar
    VasilMichev
    Feb 15, 2022
    Most third-party t2t migration tools have some way to redirect mail flow, that should be your go-to option. Other than that, PowerShell is your friend - simple loop over all mailboxes, and set the forwarding address to the corresponding @newtenant.onmicrosoft.com address.
VasilMichev's avatar
VasilMichev
MVP
Feb 15, 2022
Most third-party t2t migration tools have some way to redirect mail flow, that should be your go-to option. Other than that, PowerShell is your friend - simple loop over all mailboxes, and set the forwarding address to the corresponding @newtenant.onmicrosoft.com address.
  • TH_'s avatar
    TH_
    Copper Contributor
    Feb 15, 2022

    VasilMichev 

     

    I simply created a csv with UPN and the ForwardToAddr and imported that in the script below. Seems to have done the trick.

     

    $users = import-csv '.\UserMailboxes.csv'
foreach ($user in $users)
{
    Set-Mailbox $user.UPN -ForwardingSmtpAddress $User.FWD -force
 
    Write-Host "$($user.UPN) now forwards to ($user.FWD)"
}
$users = $null

     

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