Hello, We have a lot of shared mailboxes. For every shared mailbox, we create a specific security group that contains the members who should have access to that particular shared mailbox.
We give full mailbox permissions and send-as permissions for that particular security group onto the shared mailbox. For example, security group A has full mailbox access and send-as permissions onto shared mailbox A. By adding users to security group A, they have full access to the shared mailbox. We create every new shared mailbox/security group combo using Powershell. That has been working flawlessly for the last years.
Outlook 2013| 2010 - Using Send As or Send on Behalf Permissions Jean Frejuste. Outlook 2013| 2010 - Using Send As or Send on Behalf Permissions Jean Frejuste October 03, 2016 11:00. To send as or on behalf of: On the Home tab, select New Email. Click the box. Before you proceed, make sure you understand what send as permissions or send on behalf permissions are. This document assumes you have been granted.
However, for a recent new shared mailbox/security group combination, when a user that's member of the related security group wants to send an e-mail from the shared mailbox (by changing the from field in Outlook and selecting the shared mailbox from the global address list), Outlook tries to send every time 'send-on behalf'. This only happens for that newly created mailbox. I compared the output of Get-Mailbox and Get-RecipientPermission for the new problem shared mailbox and an older shared mailbox (which enable users to send mail send-as from outlook just fine) but I couldn't find any differences.
For your information, that's the error we get back immediately after trying to do a send-as for the new shared mailbox: Your message did not reach some or all of the intended recipients. Subject: Test from Outlook Sent: 9:27 The following recipient(s) cannot be reached: name of sending user on 9:27 This message could not be sent. Try sending the message again later, or contact your network administrator. You do not have the permission to send the message on behalf of the specified user. Error is 0x80070005-0x0004dc-0x000524. Why does Outlook always tries to do a send on behalf (what we don't want) where else for other shared mailboxes, send-as works fine? Using send-as from OWA however works just fine for the newest shared mailbox.
It only seems a problem related to Outlook (tested on multiple clients that have access to the shared mailbox) and that particular new shared mailbox. Thanks in advance.
URL: Note: availability depends on your plan. If you don't see this option in HostPilot速 Control Panel, it's possible to share mailbox folders using Outlook (read the Knowledge Base article on for more information). (which allow one user to send email that appears to come from another user’s address) and (which allow one user full access to another user's mailbox) permissions can be set in HostPilot. To set Send As (or Full Access) permissions:. Navigate to Services Mailboxes Exchange mailboxes. Click the display name for the mailbox that you want to give permissions to send from (or to have full access to). Under the Exchange tab, click the Full access & Send as link.
In the new window, add users to the access list by selecting from the address book, or enter their names and click the Check button. Select the appropriate option for whichever mailboxes you want to have Send As or Full Access permission for this mailbox. Click Save Changes in the Access Allowed For window. How to use the Send As feature: To start using the Send As feature, create a new message in Outlook and click the From button in the new message, which displays an address list where you can select the mailbox that you want to send from.
By default, the From field is hidden when composing messages. To show the From field:. Click New Email Options From.
In Outlook 2007 and later, it can be enabled in a new message in Options Fields Enable Show From. Note: if you are receiving the You do not have the permission to send the message on behalf of the specified users error message, select the Send As address from GAL rather than type it manually. To do that:. Click on the From field and select Other Email address. Click From. Make sure GAL is selected as the Address book. Find the user in the list and click OK Note: if you already have Send on Behalf permissions enabled, this will disable them.
Read the Knowledge Base article on for more information: the Send As feature works the same way for regular users granted the Send As permissions as it does for Distribution Lists. How the Full Access feature works: In Exchange 2010/2013/2016, Outlook 2010/2013/2016 automatically loads all mailboxes to which the user has full access after 10-15 minutes of propagation time. In other cases, the additional mailbox needs to be opened manually. Read the Knowledge Base article on for instructions. Note:. For mailboxes that are shared with Full Access or Send As permissions, Outlook may save sent items and deleted items into the user's primary mailbox Sent Items and Deleted Items folders.
To fix that, please refer the following Microsoft articles for and respectively. If a mailbox is hidden from GAL, it cannot be opened via any mail client. Important: sometimes the users do not need to access all mailbox data, just some specific shared folders like Inbox, Sent Items, etc. For these cases share necessary folders using Outlook. Read the Knowledge Base article on for instructions. And ask the user to open shared folders in Outlook. Read the Knowledge Base article on for instructions.