Sending emails from a shared inbox

Hello Peter,

Good day!

Thank you for reaching out to the Microsoft Community Platform. I understand that you're having trouble sending new emails from a shared inbox in Outlook, but you can respond to existing emails in the same inbox. You've been given full access to the shared inbox, but the option to send new emails is not available.

I have tried replicating my issue from my end and everytbing work fine from here. Even though the you have been given full access to the shared inbox, there could be other underlying issues preventing them from sending emails.

For instance, nested permissions or custom permissions might be restricting their ability to send emails, despite having full access. Additionally, mailbox settings or email client limitations might be configured in a way that prevents sending emails from the shared inbox. Server-side restrictions or policies could also be in place, blocking the customer's ability to send emails. Licensing issues or the type of shared inbox (e.g., shared mailbox, distribution group) might also have specific limitations or restrictions.

Delegate access might have been set up incorrectly, or mail flow rules could be interfering with sending emails. Furthermore, third-party add-ins or plugins might be causing issues with sending emails from the shared inbox. These are just a few possibilities to consider, and further investigation would be needed to determine the root cause of the issue.

Here are some few workarounds that may help resolve the issue :

1. Check the “From” Field: When composing a new email, ensure the “From” field is set to the shared mailbox.If you don’t see the “From” field, you can enable it by going to the “Options” tab and selecting "Show From".

2. Send As Permissions: Verify that you have the correct “Send As” permissions. Sometimes, even with full access, the “Send As” permission might not be properly configured.

Please note that the above solution is not intended to solve this issue at rhe first try btut a possible soluion from the infromation provided.

f this issue still persists, I strongly recommend you open a service request, where technical support has more resources and permissions than we have here in the community, and then you can collect logs to investigate this issue from the backend, and they can also have a remote session with you to navigate your setup Get Support - Microsoft 365 Admin|Microsoft Learning. This will be the most effective way to deal with the problem and help you resolve it more efficiently.

Please have this information before contacting them:

1. What version of Outlook are you using? What version of Outlook do I have? - Microsoft Support.
2. Please let them know the steps you have taken so far as well.

Rest assured, I will be checking in to ensure this issue is resolved permanently for you when you open the service request. Thank you for understanding. I will be looking forward to hear from you.

Sincerely

Eleni | Microsoft Commnunity Moderator