Windows 10: How to enable 'send as' in Outlook (Office 365 email)

Both. In OWA (web app) the users need to select Show from:




When doing this first time, the new allowed Send As email is not shown in the From drop down list. Users need to right click their usual Send As address and select Remove, then add the new Send As address manually:




After that the new address will be shown and can be selected from the drop down list.

In Outlook desktop app users need to manually remove their usual Send As address and add the new one, thereafter the new address will be shown in From drop down list.

 

Perfect, thank you Kari. The employee is getting an error at the moment (you don't have permission to send messages from this mailbox) but perhaps there's a time delay in the permission going live?

 

In my case now when testing the permission was granted immediately but O365 is know and in fact it is often told in help articles that it might take an hour to change permissions.

If the error is given in Outlook, test OWA.

 

Yeah it's OWA where the error is happening, not tried Outlook yet but will boot their machine up now to take a look....

 

It's working perfectly now, thank you.

A final (ish) question: can you set a default 'send as' address so the employees don't accidentally email from their own account? I see when you're replying to an existing email it automatically uses the correct email address but I worry about brand new emails that are created.

 

Let's first check you did it correctly. No offence meant, I just mean that it's worth to check:

In O365 admin center, select Users > Active users, select your account, select Mailbox permissions > Edit:




Add the user, click Save:




I repeated my test now, the permissions were granted immediately.

Please notice that the additional users can only use your account's primary email address as Send As address. An example: if your primary email is DorseyUK@your_domain and you have additional email as info@your_domain on your account, the users can only use DorseyUK@your_domain as Send As address but not the info@your_domain address.

Maybe a pic is better to explain this:

 

Thanks for the detailed reply, sorry you had to spend the time doing it by which point we were up and running. I'd be interested to hear your thoughts on the Q in between though if you get a mo?

 

Yes, I have moment. Time is about the only thing I have *Smile

 

Thank you.

Can you set a default 'send as' address so the employees don't accidentally email from their own account? I see when you're replying to an existing email it automatically uses the correct email address but I worry about brand new emails that are created.