How to Whitelist IP Address in Office 365

This article will guide you through the step-by-step process of whitelisting an IP Address.

Why do I need to Whitelist an IP address?

Whitelisting improves security by granting access only to trusted devices or networks, reducing unauthorized access and attack risks. Whitelisting helps to control access, protect against malicious traffic, enable network segmentation, and ensure proper secure API functionality.

Accessing Office 365 Admin Center

Whitelisting an IP address in Office 365 is essential and it all begins with accessing the Office 365 Admin Center. The Office 365 Admin Center is your gateway to managing all your Office 365 account settings. 

Here’s how to get to the Office 365 Admin Center:

1. First, open your preferred web browser (we recommend Google Chrome) and navigate to the Office 365 login page, or click here to reach the login page in a new browser tab. 
2. Enter your Office 365 credentials and sign in.
3. Once signed in to Office 365 , look for the "admin’' option in the app launcher, often represented by a gear icon. 
4. Click on "Admin" to open the Office 365 Admin Center. 

How to Whitelist IP Address in Office 365

After accessing the Office 365 Admin Center, navigate to the Exchange Admin Center. This is where you’ll find the settings for managing your email server, and it's easier than you might think.

Here’s how to get to the Exchange Admin Center:

1. In the Office 365 Admin Center, look for the "Admin Centers" section in the left-hand menu.
2. Click on "Admin Centers" to expand the options.
3. Among the options, you’ll find "Exchange" - please click on it.

Configuring Connection Filtering

Given that you have navigated to the Exchange Admin Center, the next step is configuring connection filtering. This is where you’ll set the rules determining which IP addresses can connect to your Office 365 account.

Here’s how to configure Connection Filtering:

1. Look for the "Protection" section in the Exchange Admin Center in the left-hand menu.
2. Click on "Protection" to open the protection settings.
3. Find and click "Connection Filter" within the protection settings.
4. In the "Connection Filter" window, click the "+" plus sign to add a new IP address to the whitelist.

Adding IP Addresses to Allow List

With connection filtering configured within Office 365, the next step is adding the IP address(es) to the "Allow List." This is where you specify which IP addresses should have unrestricted access to your Office 365 account.

Here’s how to add IP Address to your Allow List:

1. Find the "Allow List" section within the "Connection Filter" window.
2. Click the "+" plus sign to add a new IP address to the Allow List.
3. A new modal window or form will open. In the modal window, enter the IP address(es) you wish to whitelist.
4. After entering the IP address(es), click on "OK" or "Save" to add the IP address to the Allow List.

If you need assistance or have any further questions, please click here to contact our support team.