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Forwarding to external users from office 365 mailbox


Forwarding for external users.
First ad the external user as a mail contact in office 365 through  office 365 portal.
Go to Exchange admin center https://outlook.office365.com/ecp
Go to recipients > Contacts > (+) Mail contact

Using PowerShell
Connect to Exchange Online using remote PowerShell

New-MailContact -ExternalEmailAddress 'fafaW@externaldomain.com' -Alias 'fafaW' -FirstName 'test' -LastName 'test2' -Name 'test test2' -DisplayName ' test test2'

Create a Forwarding rule from user Mailbox.

Login to OWA > Settings > options > Mail > Inbox and sweep rules > Create new inbox rules (+)
If my Name includes in –(select the condition in TO or Cc Box)
Do the following
Forward , redirect, or send > forward the message to > select the contacts from your contact list or offline address book.

Creating forwarding rule through PowerShell

Forward Email to internal Recipient & save local copy

Set-Mailbox <Identity> -ForwardingAddress  <Office 365 User Email Address> -DeliverToMailboxAndForward $true

Forward Email to External Recipient & save local copy

Set-Mailbox  <Identity> -ForwardingsmtpAddress <External Recipient Email Address> -DeliverToMailboxAndForward $true

You can create a Transport rule too.

Go to Exchange admin center https://outlook.office365.com/ecp
Then to  Mailflow > Rules > (+)  create a new rule.

The recipient is...  is this person 'Mailbox'

*Do the following...

Bcc or cc the message to...  Select one 'Mailbox1' and '2 Mailbox' and '3 Mailbox' and 'New test'


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