Installation manual

Introduction

Use the Zivver OWA add-in to securely send and receive messages directly from Outlook Web Access (OWA). This manual describes how to install the add-in in Exchange Online (part of Microsoft Office 365). The Zivver OWA add-in is currently available for Exchange Online.

The ZIVVER OWA add-in will only work if you complete both the Installation as well as the Required additional settings.

Technical requirements

You can install the Zivver OWA add-in in Exchange Online. To use the OWA add-in, you should meet the following requirements:

  • Exchange Online
  • The users’ workstations (Windows or Mac) have one of the following modern browsers installed:
    • Microsoft Internet Explorer 11 or Edge
    • Google Chrome latest stable version
    • Mozilla Firefox v31 or higher
    • Apple Safari v9 or higher
  • Third-party cookies are set to allowed in browser settings.
    The OWA add-in uses cookies to store settings (called localStorage).
The current version of the Zivver OWA Add-in (V3) does not support the use of shared mailboxes.

Installation

You can install the ZIVVER OWA add-in via either Microsoft 365 admin center or PowerShell. Both are explained in this manual.

Deploy and configure the Zivver OWA add-in via Microsoft 365 admin center

  1. Log in to the Microsoft 365 admin center.
  2. Click add Deploy Add-In.
  3. Click Next.
  4. Select Upload custom apps under Deploy a custom add-in.
  5. Enter https://owa.zivver.com/v3/manifest.xml as the URL of the OWA Add-in manifest file.

    Make sure to include https://, even though this is already mentioned in the user interface.
  6. Click Upload.
    A Configure add-in screen is shown.

  7. Choose which users get assigned the ZIVVER OWA add-in:

    • Everyone
      All users in your organization can use the add-in. Select “Everyone” to roll out the add-in to your entire organization. For example when going Live with Zivver.
    • Specific users / groups
      Only make the add-in available for specific users or groups. Select this for a pilot of when only specific users use OWA.
    • Just me
      Only makes the add-in available for your logged in admin account. Select this if you only want to test yourself.
  8. Select how the add-in is deployed to users:

    • Fixed (Default)
      Recommended. The add-in is enabled by default for assigned users, and they can’t disable the add-in.
    • Available
      Not recommended. The add-in is disabled by default, but assigned users can install the add-in when they want.
    • Optional
      Not recommended. The add-in is enabled by default for assigned users, but they can disable the add-in when they want.
  9. Click Deploy.

  10. Read the Microsoft notice and click Next.

  11. Click Close.
    The Zivver OWA add-in is now installed and configured for your Office 365 organization. It may take up to 12 hours for the change to be implemented in Exchange Online.

Deploy and configure the Zivver OWA add-in via PowerShell

You can install the Zivver OWA add-in via PowerShell using the script below. The script is based on the Microsoft article Centralized Deployment PowerShell cmdlets to manage add-ins.

  1. Open PowerShell ISE.
  2. Open the PowerShell script to deploy and configure a new add-in via PowerShell.
  3. Paste the PowerShell script in the PowerShell ISE script pane.
  4. Save the script for reference material or for later use.
  5. Run cmdlets from the script rule by rule.
    The Zivver OWA add-in is now installed and configured for your Office 365 organization. It may take up to 12 hours for the change to be implemented in Exchange Online.

Required additional settings

Internet Explorer security zone

Add the following locations to the Trusted sites zone of Internet Explorer. This prevents a white screen during logging into the OWA add-in.

  1. Open the control panel.
  2. Click Network and Internet.
  3. Click Internet Options.
  4. Click the Security tab.
  5. Click Trusted websites.
  6. Click the Websites button.
  7. Add the following URLs as trusted websites:
    • Zivver OWA add-in: https://owa.zivver.com
    • Zivver web app: https://app.zivver.com
    • OWA: https://outlook.office.com
  8. Click Close.
  9. Click OK.

Create an Exchange rule for Zivver messages

The following rule must be set to prevent OWA from sending a Zivver message as unencrypted, regular email.

If you do not set this rule when working with the Zivver OWA add-in, then Zivver messages will be sent unsecured. This might cause a data leak.
  1. Log in to the Exchange admin center.
  2. Click mail flow in the left side pane.
  3. Select the Rules tab.
  4. Click add add new rule.
  5. Select Create a new rule …
    A pop-up prompts you to add a new rule.
  6. Click More options… at the bottom of the window that appears.
  7. Give the rule the name zivver-action: discard.
  8. Under Apply this rule if… select the option A message header… matches these text patterns.
  9. Click Enter text….
    A pop-up prompts you to enter a name of the header.
  10. Give the header the name zivver-action.
  11. Click Enter text patterns….
    A pop-up prompts you to add words or word groups.
  12. Enter discard.
  13. Click add add.
  14. Click OK.
  15. Select at Do the following… the option Block the message, and the sub-option delete the message without notifying anyone.
  16. Check the option Audit this rule with severity level:.
  17. Set the level to Low.
  18. Set the mode for this rule to Enforce.
  19. Check the option Stop processing more rules.
  20. At Match sender address in message select the Header option.
  21. Click Save.
    Now the priority can be set.
  22. Raise the priority of the zivver-action:discard rule to 0 by clicking the the arrow up icon in the task bar.
    A mail flow rule has now been created that prevents Zivver messages from being sent as unencrypted, regular email.

Verify the installation was successful

It may take up to 12 hours for the above changes to be implemented in Exchange Online. If you can’t verify that the installation is successful within 12 hours after installation, please try again the next day.
  1. Click New to create a new message.
  2. Set up a message as usual with a recipient, subject and body.
  3. Click on the three dots on the bottom of your screen.
  4. Click the Zivver icon in the bottom of the message window.
    The Zivver side panel should open on the right side.
  5. Log in to Zivver if you are not logged in yet.
  6. Turn on Secure mail.
  7. Click Recipient verification.
    A new screen listing all recipients opens.
  8. Complete the recipient verification where necessary.
    Learn more about Recipient verification
  9. Click Apply.
  10. Click Send to send the message.
    A Zivver pop-up can show to check the email and attachments on sensitive information.
  11. Verify in the recipients’ inbox that a Zivver message has been received and no unencrypted, regular email has been received.
    You have now verified the installation was successful.
Also send a unencrypted, regular email to verify the regular email flow works as intenden.

Remove the Zivver OWA Add-in from Microsoft 365 admin center

Follow the steps below to uninstall the OWA add-in from the Exchange admin center.

  1. Log in to the Microsoft 365 admin center.
  2. Select Zivver.
    The Zivver Add-in screen appears in a right side pane.
  3. Scroll down on the Zivver side pane and click Delete add-in at the bottom of the side pane.
  4. Confirm by clicking Delete. The Zivver OWA add-in has now been removed.

Remove the Zivver Exchange rule

Follow the steps below to remove the Zivver Exchange rule from the Exchange admin center.

  1. Log in to the Exchange admin center.
  2. Click mail flow in the left side pane.
  3. Select the Rules tab.
  4. Select the mail flow rule zivver-action:discard.
  5. Delete the rule delete .

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