Can’t send email when Full Access permission is granted to shared mailbox

You have Full Access permission on a shared mailbox but while sending emails using shared mailbox email address, you get error: You don’t have permission to send messages from this mailbox.

Your message did not reach some or all of the intended recipients. This message could not be sent. You do not have the permission to send the message on behalf of the specified user. Error is [0x80070005-0x000004dc-0x00000524]. You don’t have permission to send messages from this mailbox.

What is a shared mailbox

A shared mailbox is a mailbox that multiple users can access and use collaboratively. Users can add a shared mailbox in Outlook client or Outlook Web Access (OWA) and they can read or send emails from shared mailbox, or they can manage the shared mailbox calendar from their Outlook or OWA.

A shared mailbox doesn’t need a license. By default, a shared mailbox has 50GB of storage capacity. But you can increase the storage capacity of the shared mailbox to 100GB by assigning Exchange Online Plan 2 license to the shared mailbox account.

Error: 0x80070005-0x000004dc-0x00000524

The error 0x80070005-0x000004dc-0x00000524 indicates that you are sending an email using a shared mailbox but you do not have required permissions on the shared mailbox. Please refer to this link to know about shared mailbox permissions.

How to fix You don’t have permission to send messages from this mailbox

If you are trying to send emails using a shared mailbox email address with Full Access permission, you will get an error that you do not have permission to send emails from this mailbox. To fix this error, you need to assign yourself Send As or Send on Behalf permission on the shared mailbox.

To add Send As permission on a shared mailbox, please run below command in Exchange Online PowerShell:

Add-RecipientPermission -Identity "Shared Mailbox" -Trustee "Bob Ross" -AccessRights SendAs

The above command will assign Send As permission to Bob Ross on Shared mailbox.

To add Send on Behalf permission on a shared mailbox, run below command in Exchange Online PowerShell:

Set-Mailbox -Identity "Shared Mailbox" -GrantSendOnBehalfTo "Bob Ross"

The above command will assign Send on Behalf permission to Bob Ross on Shared mailbox.

Conclusion

In this blog you learnt how to fix error You don’t have permission to send messages from this mailbox. You might like our other articles on How to add a shared mailbox in Outlook and Outlook Web and Send email using shared mailbox from Outlook and OWA.

If you found this article helpful and informative, please share it within your community and do not forget to share your feedback in the comments below. Please join our YouTube channel for the latest videos on the Cloud technology and join our Newsletter for the early access of the articles and updates.

Happy Learning!!