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How can a user send email as the assigned group's shared email account?

More detail:

Our company has an office365.com account.

User [email protected] is a member of a group with [email protected] shared mailbox.

But [email protected] cannot send email as [email protected]. In fact, there is only the main email address [email protected] in the From combo-box of the user.

2 Answers 2

2

If you spend a minute searching, you will find all the articles are how Send As permissions should work with Office 365, Exchange Online and Outlook 2016. We read them all and were still getting (despite checking and re-checking permissions):

This message could not be sent. You do not have the permission to send the message on behalf of the specified user.

With the error code:

0x80070005-0x000004dc-0x00000524

The solution was to:

  1. Go into the Exchange admin center (EAC) > recipients > shared
  2. in the shared mailbox, check "Hide from address lists"
  3. Save
  4. Wait for change to propagate
  5. Go back in and clear the "Hide from address lists" checkbox

  6. From Outlook, add the address as a "From" addres.

  7. Account Settings > Account Settings > Email > the Exchange account > More Settings > Advanced > Add -- add the shared mailbox name.
  8. In Accounting Settings > Download Address Book > download the Global Address List

May need to restart Outlook.

1

This Office 365 Help page from GoDaddy should address your problem.

Send as a distribution group address

If you are an Office 365 admin, you can give members of a distribution group the permission to send as the distribution group address.

  1. In your Office 365 account, click on Dashboard.
  2. Click Launch Office 365.
  3. Log in using your Office 365 email address, and password.
  4. Go to the Exchange Admin Center.

Only the primary admin account will be able to log in to the Exchange Admin Center.

  1. Under recipients, click on groups.
  2. Select the distribution group you want to edit.
  3. Click Edit.
  4. Click group delegation
  5. Decide whether you want to assign Send As, or Send on Behalf permissions.

Send As
This allows a member of the group to send email as the distribution group address. To a recipient, the From line will display the group, only.
Send on Behalf
This allows a member of the group to send email on behalf of the group. To a recipient, the From line will display the sender "on behalf of" the group.

  1. Click Add, and find the members to whom you want to assign Send As and/or Send on Behalf permissions.
  2. Click Save.

In order to send as the distribution group, you need to show the From field in your email composer. To show the From field in Outlook, open a new email, click Options, and select From.

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