Send from Alias in M365

 Introduction: Send From Alias Feature

Microsoft 365’s Send From Alias feature allows users to send emails using an alias address instead of their primary SMTP address—without needing shared mailboxes or additional licenses. This is especially useful for support, sales, or branded communications across multiple domains, while still keeping mail management simple and centralized.

 

What Is Send From Alias?

An email alias is an additional email address associated with a single mailbox. With Send From Alias enabled, users can choose any configured alias as the From address when composing emails in Outlook

 

• Primary email: ramki@cloudfield.onmicrosoft.com

ramki@cloudfield.onmicrosoft.com

Alias used to send mail: messagingsupport@cloudmonkeys.xyz

 

The recipient sees the alias as the sender, even though the message originates from the same mailbox

 

✅ Pros

·        Eliminates the need for additional shared mailboxes

·        Reduces administrative effort and licensing costs

·        Enables consistent branding across multiple domains

·        Ideal for support, sales, and project-based communications

·        Works in Outlook Desktop, Outlook on the Web, and Mobile apps

❌ Cons

·        Feature is disabled by default at tenant level

·        Limited to aliases on the same mailbox (not arbitrary addresses)

·        Some third‑party mail clients may not fully support alias selection

 

 

How to Enable Send From Alias (GUI – Exchange Admin Center)

You can enable this feature directly from the Exchange Admin Center (EAC).

Step-by-step

1.     Sign in to the Exchange Admin Center

https://admin.cloud.microsoft/exchange

2. Navigate to Settings > Mail flow

3. Enable Turn on sending from aliases

4. Click Save

How to Enable and verify It through Exchange online PowerShell

 

Connect-ExchangeOnline

Set-OrganizationConfig -SendFromAliasEnabled $True

Practical Session: Create an Alias in Microsoft 365 Admin Center

In this practical session, you will create an email alias for an existing mailbox using the Microsoft 365 Admin Center and save the configuration.

Step-by-step

1.     Sign in to the Microsoft 365 Admin Center

https://admin.microsoft.com 2. Navigate to Users > Active users 3. Select any existing mailbox (user account) 4. Click Email aliases (or Mail tab, depending on portal view) 5. Click Add alias 6. Enter the new alias (for example: support@yourdomain.com) 7. Select the appropriate domain 8. Click Save changes

✅ The alias is now created and associated with the mailbox.

How to Send Email from an Alias in Outlook

Step-by-step (Outlook Web / Desktop)

1.     Log in to Outlook

2.     Click New Mail

3.     Enable the From field

4.     Click From → Manually type alias address for first time

5.     Compose and send the email

 

 

The email arrives and shows that the alias messagingsupport@cloudmonkeys.xyz sent the email.

In our example, the primary email is ramki@cloudfield.onmicrosoftcom, and the mail is sent from the alias messagingsupport@cloudmonkeys.xyz 

  

Conclusion

The Send From Alias feature in Microsoft 365 is a powerful yet lightweight solution for organizations that need multiple sender identities without the overhead of shared mailboxes. By placing screenshots under each configuration and usage step, administrators and end users can easily follow and validate the setup.

This feature is highly recommended for organizations managing multiple domains or functional email addresses such as support, sales, or project communications.