Using the Exchange Admin Center to split encrypted senders

Featured image

Share this article

Using the Exchange Admin Center to Split Encrypted Senders - Paubox

Using the Microsoft 365 Exchange Admin Center, it’s possible to configure a subset of users in a domain to use Paubox email encryption for outbound email.

This would apply to customers using Microsoft 365 for their email platform and Paubox as their HIPAA compliant email solution.

Here’s how to do it.


Part I: Create a Group

  1. Login to the Microsoft 365 Exchange Admin Center using Admin-level credentials.
  2. On the left side of the navigation pane, click dashboard. On the resulting screen, click groups.
  3. Next, click the + New Microsoft 365 group button, then click Distribution list.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a Group
  4. On the resulting pop-up window, enter the following:
    • routetopaubox as the Display name
    • routetopaubox as the Alias
    • routetopaubox as the Email address
    • Leave the domain name field unchanged
    • The Notes field is optional
    • Scroll down a bit and click the + button below Owners
    • From the resulting list of users, select any additional users that will manage the new group. By default, the user creating the group is the owner of the group.
    • Next, scroll down a bit and click the + button below Members
    • Select and add -> the users that will be using Paubox to send outbound encrypted email. Click OK when finished.
    • Scroll a bit further down and make sure the following radio boxes are selected:
      • Closed: Members can be added only by the group owners. All requests to join will be rejected automatically.
      • Closed: Members can be removed only by the group owners. All requests to leave will be rejected automatically.
        Using the Exchange Admin Center to Split Encrypted Senders - Create a Group
    • Click Save.

Part II: Create a Connector

  1. Now we’ll need to create a Connector. On the left side of the navigation pane, click mail flow then click connectors.
  2. Next, click the + button. Using the Exchange Admin Center to Split Encrypted Senders - Create a Connector
  3. On the resulting pop-up window, make sure From: is set to Microsoft 365 and To: is set to Partner organization. Then click Next.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a Connector
  4. On the next screen, enter Paubox in the Name field.
  5. Make sure the checkbox labeled Turn it on is checked, then click Next.
  6. On the next screen, select the radio box Route email through these smart hosts, then click the + button below it.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a Connector
  7. On the resulting pop-up window, enter outbound.paubox.com as the smart host. Then click Save.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a Connector
  8. You should now see a screen similar to the one below. Click Next to proceed.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a Connector
  9. On the next screen, make sure the Always use Transport Layer Security (TLS) to secure the connection (recommended) checkbox remains checked. Then select the radio box Any digital certificate, including self-signed certificates is selected. Then click Next.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a Connector
  10. You’ll next see a screen confirming your settings. Click Next to proceed.
  11. On the following screen, you’ll be asked to enter an email address to validate the connector. Click the + button and then enter an email to send a test email to. Click OK to continue.
    Using the Exchange Admin Center to Split Encrypted Senders
  12. Next, click Validate to test the connector.
  13. After the test email is sent, click the Close button.
  14. Click Save.
  15. You should see a screen similar to the one below.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a Connector

Part III: Create a New Rule

  1. Part III involves creating a new rule. On the left of the navigation pane, make sure mail flow is active, then click rules.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a new rule
  2. Next, click the + button and select Create a new rule…
    Using the Exchange Admin Center to Split Encrypted Senders - Create a new rule
  3. On the resulting pop-up window, enter Route to Paubox in the Name field.
  4. Under the Apply this rule if… drop-down box, select The Sender is a member of…
    Using the Exchange Admin Center to Split Encrypted Senders - Create a new rule
  5. Another pop-up window will appear. Select routetopaubox and click OK.
  6. You will next be taken back to the new rule screen. Click More options…
    Using the Exchange Admin Center to Split Encrypted Senders - Create a new rule
  7. On the next screen, click the Do the following…. drop-down box, click Redirect the message to…, then click the following connector.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a new rule
  8. Make sure the Connector: drop-down box is set to Paubox. Then click OK.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a new rule
  9. Next, click Save.
  10. As a last step, make sure the new rule is set to ON.
    Using the Exchange Admin Center to Split Encrypted Senders - Create a new rule

Congratulations! You have successfully used the Microsoft 365 Exchange Admin Panel to create a list of select users within your organization that will use Paubox Email Suite as their smart host gateway for outbound, HIPAA compliant email.

Try Paubox Email Suite for FREE today.
Author Photo

About the author

Hoala Greevy

Founder of Paubox. Kayak fishing when I can. Native Hawaiian CEO.

Read more by Hoala Greevy

Get started with
end-to-end protection

Bolster your organization’s security with healthcare’s most trusted HIPAA compliant email solution

The #1-rated email encryption 
and security software on G2

G2 Badge: Email Encryption Leader Fall 2022
G2 Badge: Security Best Usability Fall 2022
G2 Badge: Encryption Momentum Leader Fall 2022
G2 Badge: Security Best Relationship Fall 2022
G2 Badge: Security Users Most Likely to Recommend Fall 2022
G2 Badge: Email Gateway Best Relationship Fall 2022
G2 Badge: Email Gateway Best Meets Requirements Fall 2022
G2 Badge - Users Most Likely to Recommend Summer 2022
G2 Badge: Email Gateway Best Results Fall 2022
G2 Badge: Email Gateway Best Usability Fall 2022
G2 Badge: Email Gateway Best Support Fall 2022
G2 Badge: Email Gateway Easiest To Use Fall 2022
G2 Badge: Email Gateway Easiest Setup Fall 2022
G2 Badge: Email Gateway Easiest Admin Fall 2022
G2 Badge: Email Gateway Easiest to do Business with Fall 2022
G2 Badge: Email Gateway Highest User Adoption 2022
G2 Badge: Email Gateway High Performer Fall 2022
G2 Badge: Email Gateway Momentum Leader Fall 2022
G2 Badge: Email Gateway Most Implementable Fall 2022
G2 Badge: Email Gateway Users Most Likely to Recommend Fall 2022