How to Encrypt Email in Outlook with Office 365


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In this blog, I will teach you how to encrypt email in Outlook with Office 365. You can use the information below as a guide if your company has already turned on encryption for their email and have not found an easy way of removing the passwords.

The “how to encrypt an email in outlook” is a tutorial on how to use the Office 365 encryption feature. This tutorial will show you how to encrypt an email in outlook with Office 365 and also give you a step-by-step guide on how to set up your account for the first time.

How to Encrypt Email in Outlook with Office 365

Do you use Outlook with an Office 365 subscription to send a lot of confidential email? If that’s the case, you’re in luck.

Microsoft’s built-in solution for encrypting Outlook email was introduced with Office 365. Office 365 has a feature called Message Encryption. In addition to encryption, the service can guarantee that your communications are not forwarded and that your email is sent to the intended destination.

You’ll learn how to encrypt Outlook email to/from your Office 365 account in this video to keep your emails safe! You’ll learn how to use Outlook on your PC and Outlook on the Web to encrypt email.


This page will serve as a guide. If you want to follow along, make sure you have the following items:

Outlook on the Desktop Encrypting Email

Let’s get Outlook on the desktop underway! To encrypt an email, assume you have Outlook installed on your computer and follow these steps:

1. Open the Outlook application and sign in using your Microsoft or Outlook account.

2. Click New Email to start composing a new email, as shown below. This will launch a new message composer window.

Creating a New EmailCreating a New Email

3. Select the Options tab in the separate message composer box, as seen in the picture below.

Click Encrypt, then the permission you’d want to apply to this email, just below the padlock symbol on the toolbar.

Outlook confuses users by grouping numerous “permissions” under the banner of “encryption.” The email will be encrypted if you choose any “permission” from the Encrypt menu. Other features will be added to the email if you choose a “permission” other than Encrypt-Only.

Outlook offers four different email security settings.

  • Encrypt Alone — This option encrypts the message only and does not provide any further rights.
  • Recipients can view the message but can’t forward, print, or duplicate it. The data owner has complete control over their message and any responses.
  • All Workers Confidential – Requires protection that grants all employees complete rights. Content may be tracked and revoked by data owners.
  • All Workers, Highly Confidential — Allows all employees to access, modify, and comment to this material. Content may be tracked and revoked by data owners.

Outlook Email EncryptionOutlook Email Encryption

4. Now you may send your email with confidence, knowing that it is completely secured.

Using Outlook on the Web to Encrypt Email (

Outlook Email is just about the same as using the desktop version. Follow these steps to encrypt an email if you prefer to use Outlook on the Web:

1. Open your preferred online browser and go to, where you may log in using your Microsoft account.

2. Click the New message button in the top-left corner of the page to start writing an email.

Creating a New EmailCreating a New Email

3. Click the Encrypt option at the top of the message editor. The message editor will open as a result of this operation.

Using Email EncryptionUsing Email Encryption

4. At the top of the message editor, you’ll notice a message pop-up. Click the Change permissions option to change the email’s permissions.

All email sent via is encrypted by default.

Permissions ChangePermissions Change

5. In the pop-up window, choose the permission you want to establish for your email from the drop-down box, then click OK.

The permissions available are the same as they were on the desktop version of Outlook.

Permission SelectionPermission Selection

Send the encrypted email now!

Outlook Encrypted Email Reading

You now know how to send an encrypted email from Outlook, but that’s just half of the story. If someone else sends you an encrypted email after you’ve sent it, you’ll need to know how to read it.

Getting Access to Office 365 Encrypted Emails

If you use Outlook and Office 365 and receive an encrypted email from someone else using Outlook and Office 365, you’ll see a padlock next to the message, as seen below. The email is encrypted and sent from another Office 365 account, as shown by the padlock.

Indicator for Encrypted EmailIndicator for Encrypted Email

Open the email to decode it. There are no further hurdles to clear. What if it was from a different email provider?

Other Email Providers’ Encrypted Emails Can Be Read

Different email providers have different ways to encrypt email. If you’re sent an email to your Office 365 account using Outlook, your experience won’t be as seamless as Office 365 —> Office 365.

Maybe you got an encrypted email from your Gmail account. Instructions on how to access the email content are frequently included in emails received from sources other than Office 365. However, in this scenario, you may view the contents of the email simply clicking on it.

Click the padlock symbol on the email’s right-most area to check the encryption details.

Using Gmail to View Encrypted EmailUsing Gmail to View Encrypted Email

The Properties of Message Security pane reveals that the email was encrypted and signed, as seen in the image.

Properties of Message SecurityProperties of Message Security

Using ProtonMail to Decrypt Email Manually

Receiving encrypted non-Outlook emails normally includes instructions on how to decode the email, as described in the preceding example. Those instructions are specific to the email service used by the sender to send the encrypted email.

ProtonMail is a popular and secure email software that allows you to send encrypted emails to your Outlook mailbox. Maybe you received an encrypted email from ProtonMail and want to view it.

To Everyone: How to Encrypt Emails with ProtonMail

These instructions apply to Outlook on the desktop as well as Outlook on the web.

1. Open the Outlook app or a web browser, then go to and sign in to your Microsoft or Outlook account.

2. Locate and click the encrypted email from ProtonMail. Click the View Secure Message button within the email. Your web browser will open a new tab and take you to a place where you may decode ProtonMail messages.

Using Outlook to View Secure ProtonMail MessagesUsing Outlook to View Secure ProtonMail Messages

3. You’ll see a form in a ProtonMail environment on your web browser. Click the DECRYPT button after entering the password that the sender has set up for the encrypted email.

Encrypted ProtonMail Email DecryptionEncrypted ProtonMail Email Decryption

4. If decryption succeeds, you’ll be sent to a ProtonMail environment where you may view the encrypted email content in your web browser.

The email content is only available to you for a limited time. The next time you open the email, you’ll go through the same steps.

Email was successfully decryptedEmail was successfully decrypted


You’ve learned how to send secure emails using Outlook and Office 365, as well as how to decode emails from other email providers, in this post. To keep your critical communications safe, you should now know how to send and receive emails.

For email encryption, which email services do you prefer?

The “how to encrypt email in outlook web app” is a tutorial that will show users how to encrypt their emails with Microsoft Office 365.

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