Struggling with granting SendAs permissions on user’s cellphones?
Just use our lifehack to do it!

Not so long ago, Misha Hanin wrote about the most convenient way to tackle multiple email addresses on your desktop. Now, we want to help you with solving the challenge of setting up Receive As / Send As options on users’ mobile devices.

When using our email software we often do simple things, for instance, we send emails as someone else: a support, a marketing or HR team. Of course, there is no malicious or spam actions here – only our job functions delivery. So, let’s quickly solve a simple quiz from the brave Exchange Online world:

  • We have our own two domains, and  
  • The primary domain is, but our dear user wants to send their emails from another address, for example, ask_hr!

Let’s suppose we use Office 365 in this particular example. How can we solve this case and provide an opportunity for the user to send emails?

We can use several solutions here:

  1. Create a shared mailbox and use OWA Private mode for sending emails, grant Send As rights beforehand.
  2. If we want to send emails from one address it works fine, but what if we have more than five such addresses in our responsibility?
  3. The second way is a little bit easier, but relies on more work steps to accomplish the task:
    We should use POP or IMAP connection and simply add our account needed in Outlook. Again, not a great idea, right?
  4. The third way, the most convenient one and familiar to any Exchange admin:
    The point here is we simply create shared mailbox, mail contact or distribution group with members and use Send As rights with Outlook client. As simple as that, right? Extremely fast and neat, it’s our choice forever. But!

What if the user wants to send their emails using mobile, now what? Tell them “Forget about that, bud”? No.
We can’t do that for sure, so we should use one tiny lifehack.

Ready? Go!

  1. Create a shared mailbox and give Send As rights to the user on it.
  2. Set up a strong password using MSOL cmdlets (also you can always use Office 365 Admin Center).
    And now the most magical step…
  3. Add this shared mailbox in user’s mobile Outlook as the second one (this is critical).
  4. Enjoy sending your impersonating emails using mobile client!


There it is, homework solved.
Written by Dima Razbornov

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