Outlook additional mailboxes and from functionality

This is an old issue that I haven’t encountered lately but I was reminded of the other day when adding a shared mailbox for a user and felt a post might help someone else out. Previously I got a request that when sending from a mailbox that had been added as additional mailboxes the from is always sent from the default mailbox not from the additional mailbox unless you go up to options and click the from button to enable the from field and change the from address as shown below.snip_20160602101231

As it is easy to forget to change the from field and kind of a pain to change every time I went on the hunt for an answer to my dilemma.  I can’t seem to find this functionality in Microsoft’s documentation anywhere, but if you add the mailbox as a new email account instead of an additional mailbox the from address will change based on what mailbox you are in when you click new email.  As in the screenshot below you can accomplish this by  going to the file tab and account settings.

snip_20160602101853

To add the mailbox click new on the email tab, then click next.  Then type in the mailbox name and the email address.  The password can be left blank since aslong as you have full access and sendas permissions delegated to the user in Exchange.  Then just click next through the rest of the prompts and finally click finish.

snip_20160602102725

The only caveat to this is that automapping in Exchange adds as an additional mailbox so you might end up with duplicate entries of the same mailbox.  To fix this you will need to add the mailbox permissions through EMC (Exchange Management Console).  Microsoft has instructions on how to add the permissions without automapping in this Technet Article but the command for the EMC is also below.

Add-MailboxPermission -Identity JeroenC -User 'Mark Steele' -AccessRight FullAccess -InheritanceType All -Automapping $false

If you want to fix existing auto-mapping behavior for all the permissions on a particular mailbox the below commands will do the trick.

$FixAutoMapping = Get-MailboxPermission sharedmailbox |where {$_.AccessRights -eq "FullAccess" -and $_.IsInherited -eq $false}
$FixAutoMapping | Remove-MailboxPermission
$FixAutoMapping | ForEach {Add-MailboxPermission -Identity $_.Identity -User $_.User -AccessRights:FullAccess -AutoMapping $false}

So there you have it, a simple fix for someone using a shared mailbox that needs to be able to send from the shared mailbox.
The articles I posted are from Exchange 2010 and Outlook 2010 but I have confirmed the functionality is the same in Outlook 2013 and Exchange 2013.
 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s