Bounce back sending from Shared Mailbox (O365 & Outlook 2016)

[thecomputerguy]

I have a client I setup a shared mailbox so they could temporary receive mail at jobs@ while they look to hire someone.

Logged into O365 Exchange Admin Center > Mailbox's > Shared Mailbox's

Created the new shared mailbox and gave the user full access to the mailbox, send & receive.

Opened up Outlook after a few hours and added the mailbox in "Open additional Mailbox's" in account setup.

The mailbox shows up fine ... Click new mail > From (Dropdown) > Other Email Address

I select the shared mailbox email address and send the mail and it works fine.

Next time you goto send mail jobs@ is already there in the dropdown ... you select it, then send the email and I get this bounceback. Basically the email always goes out the first time no problem, then once you select the shared mailbox from the dropdown (From field) it will no longer work until you remove the shared mailbox from the dropdown (hit the X), then manually go and re-add it. Then it sends one, and bouncesback all over again. Help?


Your message did not reach some or all of the intended recipients.
Subject: Receptionist
Sent: 8/31/2017 3:49 PM
The following recipient(s) cannot be reached:
'xxx@ymail.com' on 8/31/2017 3:49 PM

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].

 

[HCHTech]

Can you send to that address if you log on directly to O365 using the jobs@ address?

Also, make sure the user has "send on behalf of" privileges for the jobs@ address.

 

[thecomputerguy]

jobs@ is not a user so it cannot be logged into via the portal ... it is a Shared Mailbox.

And yes ... send on behalf are correct.

 

[thecomputerguy]

Well I caved and called O365 support and they verified everything is setup correctly and it should be working so they are supposed to call me back

 

[cyabro]

If the user has been been given full permissions on the shared mailbox you don't need to add it via the 'Open additional Mailbox's', it will just appear in their Outlook.
Maybe try remove it from there and see if it works.

 

[HCHTech]

jobs@ is not a user so it cannot be logged into via the portal ... it is a Shared Mailbox.

And yes ... send on behalf are correct.

To fix this while the O365 team is figuring it out, why not just create a separate user for the Jobs address and grant full access permissions to the person or persons you want to be able to send as this address? Abandon the shared mailbox idea until the problem is identified.

 

[nlinecomputers]

To fix this while the O365 team is figuring it out, why not just create a separate user for the Jobs address and grant full access permissions to the person or persons you want to be able to send as this address? Abandon the shared mailbox idea until the problem is identified.

You'd have to buy another license for that.

 

[HCHTech]

You'd have to buy another license for that.

Yes... but it will get them working now vs. waiting. I presume the ad has already been posted, so it's probably pretty inconvenient for them to not be able to respond to resume's they are receiving.

 

[seedubya]

I presume you've seen and worked through this? https://support.microsoft.com/en-ie...age-when-full-access-permission-is-granted-to and that you've verified that the permissions actually "took" when you granted them?

 

[thecomputerguy]

I presume you've seen and worked through this? https://support.microsoft.com/en-ie...age-when-full-access-permission-is-granted-to and that you've verified that the permissions actually "took" when you granted them?

Yep confirmed via Powershell...

He called me back and I was tired of dealing with it so I told him that I was going to delete the shared mailbox ... and re-create it through groups > shared mailbox's as opposed to creating in the EAC which apparently ... is the old way of doing it?

Either way I'll report back I've already spent way too much time that I'm not getting paid for to fix this ... I could have had this setup in minutes if I had just created a new user.

 

[thecomputerguy]

If the user has been been given full permissions on the shared mailbox you don't need to add it via the 'Open additional Mailbox's', it will just appear in their Outlook.
Maybe try remove it from there and see if it works.

You are correct ... I did both ... Auto-add and manual add.

When you manual add the auto-add goes away the next restart of Outlook.