Change default send as to a shared mailbox in Outlook (O365)

[thecomputerguy]

Client wants the default mail account to send from to be sent from a shared mailbox.

I.E. The workstation has john@contoso.com as the mail account configured in Outlook. john@contoso.com has full access, and send as, for admin@contoso.com and info@contoso.com which are both shared mailboxes.

The client wants any email sent from that computer regardless of any condition to be sent from admin@contoso.com

I looked here: https://support.microsoft.com/en-us...messages-2bdd8d4f-e30f-4ec8-88a0-406ce7b23cc5

But it doesn't apply because admin@ and info@ are not installed as mail accounts in Outlook. I was hoping to avoid configuring Outlook with multiple mailboxes from the same tenant. I've had issues with that before.

Per:

1. Select File > Options > Mail.
2. Under Send Messages, check the box Always use the default account when composing new messages.
3. Select OK.

 

[Sky-Knight]

You cannot send from a mailbox that isn't its own account in Outlook.

Honestly, what I'd do is change John's mailbox to use admin@ as the login email, and leave john as an alias, then configure a mail flow rule to copy anything received by admin@contoso.com and forward a copy to another shared mailbox to act as a holding bin.

 

[YeOldeStonecat]

You can send from a mailbox that isn't its own account in Outlook. Microsoft added the ability to "send from a shared mailbox" a while ago, you can add the "From" button in Outlook, and select the shared mailbox address if you want to send from it.
They also recently added sending from additional aliases in your own mailbox.

However, I'm not aware of any trick to "default" the sent from address to one from a shared mailbox.
So, you'd have to add the shared mailbox as another account in Outlook....you can do that by resetting the password on the shared mailbox and adding it like another account. And make it the default account.

Or, another approach, get rid of Johns account...and add John as an alias to the Admin account....and just have him use the Admin account.

 

[Sky-Knight]

@YeOldeStonecat Yeah, but it doesn't work in a way that's terribly easy to use. Not to mention you have to hit that drop down every single time.

If you add the shared mailbox to Outlook as an additional account, you can configure Outlook's defaults to send from that mailbox by default in the appropriate place. So hitting reply to something in the shared mailbox automatically uses the correct account.

I do this for my personal vs business emails that coexist on my M365 tenant.

This process is what I use: https://www.michev.info/Blog/Post/2...d-8431-and-above-on-windows-10-1709-and-above

 

[YeOldeStonecat]

Yah understood it won't default. But you have to admit, defaulting to another address as the primary may mean you change your email setup. Why have the email you never will use..be your primary?

However, I find the "change the FROM address" function wicked easy for the couple of times I use it, have quite a few clients use it...it's not a common thing

 

[Sky-Knight]

Yeah, unless you're like me and trying to keep two businesses and personal stuff separate in the same Outlook, it's got limited value.