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Sending Email from a Secondary Exchange Mailbox

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› Exchange Server › Sending Email from a Secondary Exchange Mailbox

Last reviewed on September 15, 2021     53 Comments

A visitor asked how to send mail from a shared email account:

We have several users that need the ability to view, send and receive emails for different accounts. We can get everything set up correctly except for one piece. Anytime a person sends out an email it is sent from the wrong mailbox and also shows up in the incorrect sent box.... We don't have a selection of which account to send from.

Delegates of shared accounts who can send mail on behalf of and have full control of all the folders in the shared account can save sent items and deleted items in the mailbox owner's folders. However, a registry key may need to be set.

You need to use Cached Exchange mode for this to work!

In all versions of Outlook, there are two basic ways to control where sent mail is saved for the secondary account. Assign the user Send as permissions then save the email to the secondary account's Sent Items folder using rules or a registry value, or add the second account as an IMAP account.

If your mailbox is located on Exchange Server 2010 or newer (including Office 365 Exchange Online), the Exchange administrator can configure similar behavior on the server. Because this new feature is handled by the Exchange server, Outlook can be configured for Online or Cached Exchange Mode. However, the Exchange server feature only works if the Outlook DelegateSentItemsStyle registry value is disabled.

See Save Sent Items in Shared Mailbox using an Exchange Server Cmdletfor more details.

Saving Sent Items in the Shared Mailbox

To save items in the Sent folder with the mailbox open as a secondary mailbox, you will either need to use "After sending" rules or a registry hack. Either way, your default Exchange account will need to have Send as permission and create permission on the Sent items folder.

This applies to Deleted items as well. See Deleted items for the registry key.

First, in the Active Directory, give the user's account send as permission on the accounts he needs to send from. The user then types that address in the From field (or click the From button and select it from the GAL) when preparing the message.

Delegates with permission to send email on behalf of another user should have the correct permission already. However, SendAs permission will eliminate mail being sent "on behalf of" the mailbox owner.

In the secondary mailbox, the user's account will need permission to create items in the Sent Items folder. This can be set from Outlook. Right click on the Sent Items folder and choose Properties, then Permissions tab. The user needs sufficient permissions to create items in the folder.

With Outlook 2003, 2007, or 2010, the sent message can be moved to the secondary account's Sent folder automatically if a registry key is set and appropriate hotfixes or updates are installed.

Users of all version of Outlook can use after sending rules or an add-in to move the sent messages to move sent items to the correct folder.

While you can open secondary mailboxes Outlook 2010, you can also open the account as a second Exchange account. However, we recommend delegates use the "old" method of opening the shared mailbox as a secondary account in their profile.

When the user has Full Access rights to the mailbox, the mailbox is opened in the profile automatically in Outlook 2007 and 2010.

DelegateSentItemsStyle Registry Value

To move sent messages to the correct sent items folder in Outlook 2010, 2007, or 2003, you need to enable a registry setting. (If you have the latest service pack for your version of Outlook, the hofix may be installed.)

Outlook 2016

Open the registry editor and browse to:

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences
DWORD: DelegateSentItemsStyle
Data Value: 1

Outlook 2013

Open the registry editor and browse to:

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Preferences
DWORD: DelegateSentItemsStyle
Data Value: 1

Outlook 2010

In Outlook 2010, you need to have SP1 (or greater) installed. Open the registry editor and browse to:

HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Preferences
DWORD: DelegateSentItemsStyle
Data Value: 1

Outlook 2007

In Outlook 2007, install the June 30, 2009 hotfix, described in KB article 970944. Then open the registry editor and browse to

HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Preferences
DWORD: DelegateSentItemsStyle
Data Value: 1

Outlook 2003

For Outlook 2003, you need this hotfix package. Once its installed, open the registry editor and browse to

HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Preferences
DWORD: DelegateSentItemsStyle
Data Value: 1

With all versions you will need to close and restart Outlook for the registry change to take effect.

Do It For Me

If you don't want to edit the registry yourself, I have ready-to-use registry files you can download and run to set the DelegateSentItemsStyle.
Outlook 2016 Outlook 2013 Outlook 2010
Outlook 2007 Outlook 2003

Who sent the message?

If you need to know who sent the message, you can add the change by field to the Sent Items folder.

To do this, right click on the row of field names and choose Field Chooser. Select All Mail Fields then find Changed By in the list.

Use the changed by field to see who sent the message

Create a Second Account

If editing the registry to enable the add the DelegateSentItemsStyle registry value is not an option, you can add the additional accounts to the profile as IMAP accounts, then select the account when composing the message.

If you have Outlook 2010, an IMAP account is not necessary as you can add additional Exchange mailboxes to your Outlook profile as additional Exchange accounts. Note that this is not recommended for users with delegate permissions to the mailbox. These users should use either the DelegateSentItemsStyle registry key (or after sending rules) or create an IMAP account.

How to Edit the Registry

Press Windows key + R to open the Run dialog, type regedit and press Enter.

  1. Browse the registry and locate HKEY_CURRENT_USER\Software\Microsoft\Office\xx.0\Outlook\Preferences (Where xx is your version of Outlook.)
  2. Right click on Preferences key and select New, DWORD Value.
  3. Type (or paste) DelegateSentItemsStyle for the DWORD
  4. Double click on DelegateSentItemsStyle to open the Edit dialog then type 1 for the Value data and close the dialog.

Add the DelegateSentItemsStyle name to the registry and set the data to 1

Don't forget to close and restart Outlook!

 

Tools

Lucatec Mask

Lucatec Mask Add-in for Outlook is used with Exchange server accounts, allowing replies from a shared mailbox or public folder, automatically entering the folder or mailbox's email address in the From field. Lucatec Mask will automatically determine the correct sender address to use based on the mailbox or public folder the user is currently using in Outlook. It also offers the option to move or copy the sent message to the relevant account's Sent Items folder (or Public Folder). It supports shared Exchange Server accounts and Public Folders with email addresses. Works with Outlook 2000-2010. Version 3

RightFrom for Outlook

RightFrom automatically fills in the correct From address when the user is responding to a message in another user's Exchange mailbox. Also RightFrom utility can associate the signatures with the mailboxes. When John Doe navigates to Sales mailbox and clicks the "New message" button, the From: field will be populated automatically with "Sales" and the salesperson (non-default) signature will be added to the message automatically too.

Timed Email Organizer

Timed Email Organizer is a brand new add-in which can replace or augment your Outlook rules. Unlike Outlook, this add-in will act on emails based on how old they are, supports ANDs, ORs, NOTs and wildcards in the conditions, and has a test mode so that you can see what the effect of a given rule would be if it were run. It will even import your current Outlook rules and automatically disable them for you.

UniSent Add-in for Outlook

Outlook COM add-in for Exchange Server users who need to send mail from a second mailbox. The add-in ensures that messages sent with the second mailbox's From address or deleted from the second mailbox stay in the Sent Items or Deleted Items folder of the second mailbox.

VBOffice SAM

SAM automatically sets the sender, signature, and folder for sent items based on several criteria. Use SAM to assign a sending account or SendOnBehalf address and signature to contacts, folders, or categories. Works with Outlook 2007, 2010 and Outlook 2013, 2016.

MSKB Articles

When you send an e-mail message from a shared mailbox in Outlook 2007, the sent message is not saved in the Sent Items folder of the shared mailbox
Description of the Outlook 2007 hotfix package (Outlook.msp): June 30, 2009
Items that are deleted from a shared mailbox go to the wrong folder in Outlook
An e-mail message does not appear in a user's mailbox if the e-mail message was sent on behalf of the user by a delegate in Outlook 2003
Description of the Outlook 2003 hotfix package: June 18, 2008

Sending Email from a Secondary Exchange Mailbox was last modified: September 15th, 2021 by Diane Poremsky

Related Posts:

  • Save Sent Items in Shared Mailbox Sent Items folder
  • Exchange Server and Secondary Email Addresses
  • When you need to access a non-default calendar in another user's m
    To Add a Second Mailbox to Your Exchange Profile
  • Shared Mailboxes and the Deleted Items Folder

About Diane Poremsky

A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book. She also created video training CDs and online training classes for Microsoft Outlook. You can find her helping people online in Outlook Forums as well as in the Microsoft Answers and TechNet forums.

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Odie (@guest_211412)
June 28, 2018 5:29 pm
#211412

Hi Diane,

I have an exchange 2016. When user is sending an email from the shared mailbox with BCC the sent email goes to her personal mailbox and the shared mailbox. But the BCC only shows in her mailbox not to the shared mailbox. We tried to install registry keys and resetup the Outlook. It works the email now goes to the shared mailbox and she can now see the BCC. But she also wants to see it on the own sent items. Any suggestion? Would rule is the only fix?

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Odie
July 6, 2018 9:49 pm
#211472

I'll need to test it. A rule should solve the problem though.

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Andreas (@guest_207003)
June 7, 2017 5:10 am
#207003

Hello Diane,
thanks a lot for sharing your knowledge. I used the Outlook 2013 REG File
to fix the sent item issue for a user mailbox (not a shared one). The customer
runs Exchange 2010. After that REG fix the function "send on behalf" does
not work any longer for him. Do you hane any clue what went wrong?
Regards from berlin - Germany,
Andreas

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Andreas
June 7, 2017 6:36 am
#207004

If you remove the key and restart outlook, does send on behalf of work again? It shouldn't affect it at all and sounds more like permissions were changed on the server that affected it.

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Andreas (@guest_207030)
Reply to  Andreas
June 8, 2017 8:37 am
#207030

Dear Diane,
thank you for your quick answer. I aggree, this only can be a server issue and I
could fix it. I checked the permission of the mailbox user and it was correct.
Here was the problem: the address "from" in outlook pointed to an outdated
address reference.

Best regards,
Andreas

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Andreas
June 11, 2017 10:19 am
#207075

>> Here was the problem: the address "from" in outlook pointed to an outdated
the shared address was outdated? That will do it - delete it and reselect it from the GAL (i would use the gal, not the offline address book).

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Mike Delaney (@guest_206582)
May 17, 2017 7:37 am
#206582

Hi Diane,

I'm using Group Policy to push the DelegateSentItemsStyle registry entry, and it is working. I have a question though regarding the customizing of the view settings. When I add the Changed By field in the shared mailbox, the field does not display my name as the sender. It displays the shared mailbox name.

I was assigned Full Access permissions to the shared mailbox via the Exchange server and was not delegated permission. Is delegate permissions required in order to have my username appear in the Changed By field?

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Mike Delaney
May 24, 2017 1:37 am
#206721

When you have full access, your account is an owner and you act as the mailbox. You would need to have on send on behalf of permissions instead to see your name in the sent folder - either applied alone or in delegate permissions.

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Sam (@guest_205329)
March 17, 2017 11:00 am
#205329

Just wanted to drop and and thank you for the info here. Really helped me sort out a head scratcher on our exchange/outlook. Also made the up front staff happy.

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Jay Libove (@guest_203772)
January 6, 2017 5:10 am
#203772

Hi Diane,
Vaguely related; when I click the From: dropdown when composing a new email, I get a list of the real email accounts configured in Outlook, and I get the ability to manually type an Other Email Address to put in the From: of a particular message that I compose.
Usually, Outlook remembers these Other Email Addresses, so I can see them in the From: dropdown in future and not have to re-type them every time.
I've recently fresh-installed two of my systems, with Windows 10 and Office 2016.
On one of them, Outlook 2016 does remember my Other Email Address and show it to me in the From: dropdown ... but on the other it doesn't remember.
I've done some research on this and not quite found the answer (see https://social.technet.microsoft.com/Forums/office/en-US/6ad4c9a9-48d1-454b-be07-62e39275dfe7/outlook-2016-remember-other-email-address-from-dropdown-for-future-emails?forum=Office2016ITPro ).
Can you comment? Why wouldN'T Outlook 2016 on one particular installation remember a manually entered Other Email Address?
How can I force Outlook 2016 on that computer to remember the other address?
thanks,
-Jay

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Jay Libove
January 6, 2017 10:57 pm
#203787

Well, it should remember the ones you added. This is stored in the registry so it sounds like the registry is not getting updated for some reason - do you have any addins or applications that access outlook data and could be preventing it from closing cleanly?

Does it keep the list if you add it manually? (use the correct account key - if you added the same accounts in the same order, the account key should be the same on both systems).

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Mark Wong (@guest_207001)
Reply to  Diane Poremsky
June 6, 2017 11:34 pm
#207001

Hi Diane,
I also had similar issue as Jay
Our user had two Exchange account with same profile,
Outlook do not save the send from address
Every time send mail from Shared mailbox,
user need key in the From: address again
If this is registry issue, how to fix?

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Mark Wong
June 7, 2017 7:55 am
#207005

There are normally two reasons why it doesn't remember - wrong permissions on the registry (it shouldn't be this if other settings stick) and the address is mistyped.

If you open outlook using run as admin and try to send from the address, does it save it? That would point to a registry permission issue. (The key is stored in the Accounts section in the profile.)

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Mark Wong (@guest_207207)
Reply to  Diane Poremsky
June 19, 2017 12:11 am
#207207

Sorry for late reply,
Outlook run as admin no help,
and very sure the sender address is correct

The user only had single exchange account in OUTLOOK is working fine

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Eric (@guest_200530)
August 9, 2016 4:10 pm
#200530

Is there a way to make a user default to send as the shared mailbox, by them clicking reply/reply all from within the shared mailbox? And for it to use the correct signature?

BTW thanks for this post, haven't tried it yet, but I wanted this functionality with the sent/deleted items folders.

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Eric
August 10, 2016 1:28 am
#200547

If you have send permissions, replies and forwards should use the correct account - new messages won't but you can use a macro to do this. If the shared mailbox is mapped, not added as a new account, the signature won't change automatically but a macro can change it.

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Mark (@guest_190672)
April 29, 2015 1:41 pm
#190672

Hi Diane,
If you create an “Additional Mailbox” but on a different Exchange Server, what happens when your initial (or primary Exchange Server) goes down?
I.E.:
So site “A” has you Exchange Server and your personal exchange account.
Site “B” has a Group/Shared account.
You setup your personal account with the Shared ‘group’ account that is at another site (let’s say Site “B”).
If site “A” server goes down. Obviously send/receive from your personal won’t work, but can you send emails from the Group/Shared account?
I ask, because the Group/Shared account ‘feels’ like a child account of the primary/personal exchange account.
Also, does the “Send As” make a difference for this scenario?

Thanks in advance.
Mark

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Mark
April 29, 2015 3:20 pm
#190679

I have not tested this scenario - I'm going to say it wouldn't send because it's dropped in your outbox. Send as won't matter, because it still uses your mailbox's outbox.

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Brett Snowball (@guest_190313)
April 14, 2015 3:01 am
#190313

The registry entry works a treat and when a new email is sent from Outlook 2013 (Windows 7 & Exchange 2010 SP1) as a 'send on behalf', it goes to the 'on behalf' sent items. However, my client does a lot of 'send to-mail recipient' emails from pdf/excel/word files but it always goes to their own personal sent items rather than the 'on behalf of' sent items. Is this a design feature or am I missing something? Has anyone else noticed this behavior?

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Diane Poremsky(@diane-poremsky)
Author
Reply to  Brett Snowball
April 14, 2015 6:26 pm
#190324

it's a limitation of the send to command. If he is sending from windows explorer, using the send to shortcut, you can customize it - signatures and stationery will work too. https://www.slipstick.com/outlook/create-a-custom-send-to-shortcut/

if you are sending using an application's file, send to command, i don't have a workaround for it.

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jjjeroenski (@guest_210002)
Reply to  Diane Poremsky
January 18, 2018 5:46 am
#210002

Hi Diane,
Still nothing solved or workaround about this ?

if you are sending using an application's file, send to command, i don't have a workaround for it.

Found online some posts with same issue but nobody with an answer, strange because the pdf > mail button is well know and a lot used...

Thanks in advance

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Diane Poremsky(@diane-poremsky)
Author
Reply to  jjjeroenski
January 18, 2018 8:26 am
#210006

the way the File, Send command connects into Outlook, prevents this from working. if you use a current version of Exchange server, the method here should work to add it to the shared mailbox - https://www.slipstick.com/exchange/save-items-shared-mailbox-exchange-server-cmdlet/

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