In this blog I will share How to Set Send as permission on a user mailbox in Office 365.
Only a Exchange admin or Global admin can allow any user be able to send email as some other user in the same Office 365 organization, by adding the required permissions.
The setting is called Send as permission, when someone is given send as permission on a mailbox, they can send email as that mailbox.
For example, when Tom’s mailbox has send as permission on Jack’s mailbox, if Tom sends an email to Anthony by switching the Sender address with Jack’s email address, then Anthony will receive the email as if it has been sent by Jack.
Global Admin or Exchange Admin on a Office 365 tenant can access user mailboxes setting page. Using that page they can provide any mailbox user, send as permission.
Steps to Set Send as permission in Office 365:
Go to https://Office.com > Sign in with your Exchange or Global Admin account.
Once Signed in, Click on the Admin tile:
Click on Users then click on Active users tab:
On this page, click on the user’s Display Name on which you want to give someone else Send As permissions > then click on the Mail tab > Under Mailbox permissions click on Send as Permissions:
Then click on Add permissions:
Search for user account who wants to send email as this user, check the box and click on Add to save the permission:
Once saved successfully you should see the window below:
In my example above I have given Adam Levine send as permission on user named “abc”.
Now the permission has been setup on the mailbox correctly we will now see how we can send email as abc user.
How to Send email as other user:
In my case I will Login with Adam’s account on https://Office.com and then click on Outlook:
Once the Outlook is loaded completely, I will click on new email:
Now to change the From address to abc, we will first have to enable the From field.
To enable it, Click on Options and then check the box for Show From:
Now to change the email, left click on From and select Other email address:
I will type the complete email address of abc account, and make sure to select it form the suggestion only:
After selecting the From address you can Draft the email as you like and then send the email, the recipient, be it external or internal will receive the email as if it was sent by abc user account as per my example above.
On Outlook Desktop the steps as same as well.
In conclusion to Set Send as permission in Office 365 you have to be a Global admin or Exchange admin then you can go to the admin center, click on the user’s name then click on the Mail tab and then Under Mailbox permissions click on Send as Permissions.
If you are looking for steps to be able to view some other user’s mailbox without their password, you can refer this Article.
If you have any question please drop it in the comment section.