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Configure Conditional Access Policy to restrict access from specific ip in O365

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How to restrict access to Office 365 by IP address?

Office 365 IP restriction by miniOrange is a cloud-based solution that allows you to restrict access to your Office 365 resources based on IP address. This can help to protect your data and applications from unauthorized access.

miniOrange Office 365 IP restriction solution offers a number of features, including:

• IP allow lists and deny lists: You can specify a list of IP addresses that are allowed or denied access to your Office 365 resources.
• Dynamic IP address tracking: miniOrange solution can track the dynamic IP addresses of your users and devices, so you can be sure that they are always able to access your Office 365 resources.
• Granular control: You can apply different IP restriction policies to different groups of users or devices.
• Reporting and auditing: miniOrange solution provides detailed reports and auditing logs, so you can track who is accessing your Office 365 resources and from where.

Prerequisites

1. Sync On-Premise Active Directory with Azure Active Directory

NOTE: If you want to use your On-Premise Active Directory as a user store for Office 365 IP Restriction then follow the below steps to sync your AD and Azure AD.

• Download the Azure AD Connect
• Run the Azure AD installer on your domain machine and follow the setup.

2. Verify your UPN Domain in Azure Portal

• In the Azure portal navigate to Azure Active Directory >> Custom domain names and click on Add custom domain.
  
• Enter the full domain name in the right pane that pops up and click on Add domain.



• A new window will open up with TXT/MX records for the domain. You will have to add the resented entry in your domain name registrar.



• Click on verify once you have added the entry

Follow the Step-by-Step Guide given below to configure Office 365 IP Restriction

1. Setup a Custom Branded URL in miniOrange Admin Console

Office 365 IP Restriction requires a custom branded URL to be set. Access to miniOrange and connected resources will need to be through the custom branded URL in the format: https://<custom_domain>.xecurify.com/moas

• Login to miniOrange Admin Console.
• Click on Customization in the left menu of the dashboard.
• In Basic Settings, set the Organization Name as the custom_domain name.
• Click Save. Once that is set, the branded login URL would be of the format https://<custom_domain>.xecurify.com/moas/login

2. Configure Office 365 in miniOrange

• Login into miniOrange Admin Console.
• Go to Apps and click on Add Application button.



• In Choose Application Type click on Create App button in SAML/WS-FED application type.



• In the next step, search for Office 365. Click on Office 365 app.



• Make sure the SP Entity ID or Issuer is: urn:federation:MicrosoftOnline
• Make sure the ACS URL is: https://login.microsoftonline.com/login.srf
• Click on Next.



• Configure Name ID based on the User Store you are using:
  • Using Active Directory / miniOrange brokering service: Select External IDP Attribute from the dropdown and add objectguid in the text-box that appears.
  
  • Using miniOrange as a User Store: Select Custom Profile Attribute and select a Custom Attribute from the drop-down.
  
• Set the login policy. You can choose to enable 2FA for login or have users login using a standard username-password.
• Click on Save to configure Office 365.

3. Configure Microsoft Online Services

• Click on Select dropdown and choose Metadata.
  



• Click on the Download Federate Domain Script button under "INFORMATION REQUIRED TO AUTHENTICATE VIA EXTERNAL IDPS"



• Enter the domain name that you want to federate and click on Download. Note: You cannot federate your default "onmicrosoft.com" domain. To federate your Office 365 tenant, you must add a custom domain to Office 365.



• After downloading the script, Open PowerShell run the federate_domain script using: cd ./Downloads powershell -ExecutionPolicy ByPass -File federate_domain.ps1



• Your domain is now federated. Use the commands below to check your federation settings: Connect-MsolService Get-MsolDomainFederationService

4. Configure Office 365 IP Restriction: Restricting access with IP Blocking

You can allow a IP Address in certain range for SSO or you can deny it based on your requirements and you can also challenge the user to verify his authenticity. Adaptive authentication manages the user authentication based on different factors such as Device ID, Location, Time of Access, IP Address and many more, thus improving the security and functionality of Single Sign-On.

You can configure Adaptive Authentication with IP Blocking in following way:


• Go to Adaptive Authentication from the left navigation bar.
• Click on Add Policy tab.
• Add a Policy Name for your Adaptive Authentication Policy.



• Enable Enable IP Restriction option from the IP RESTRICTION CONFIGURATION section to configure custom IP range.



• Select the Action you want to perform if the IP address is out of the range. i.e. Allow, Challenge & Deny.
• Specify the IP Address range for which you want above setting to reflect. You can add more than one IP Address ranges by clicking on following button +.
• We support IP addresses range in three formats i.e. IPv4, IPv4 CIDR and IPv6 CIDR. You can choose whichever is suitable for you from the dropdown menu.
• Now select your Action for behavior Change and Challenge Type for user from the Action for behavior Change Section.





Action for behavior Change Options :




Attribute	Description
Allow	Allow user to authenticate and use services if Adaptive authentication condition is true.
Challenge	Challenge users with one of the three methods mentioned below for verifying user authenticity.
Deny	Deny user authentications and access to services if Adaptive authentication condition is true.




Challenge Type Options :




Attribute	Description
User second Factor	The User needs to authenticate using the second factor he has opted or assigned for such as OTP over SMS PUSH Notification OTP over Email And 12 more methods.
KBA (Knowledge-based authentication)	The System will ask user for 2 of 3 questions he has configured in his Self Service Console. Only after right answer to both questions user is allowed to proceed further.
OTP over Alternate Email	User will receive a OTP on the alternate email he has configured threw Self Service Console. Once user provides the correct OTP he is allowed to proceed further.



• Scroll to the end and click on save.

5. Enable Office 365 IP Restriction

• Go to Policies >> App Login Policy from the left navigation bar.
• Click on Edit option against your selected app.



• Set your application name in the Application and select password as Login Method.
• Enable Adaptive Authentication.
• From the Select Login Policy dropdown, select the policy we created in the last step and select the required restriction method as an option.
• Click Save.

External References

• Configure Two-Factor Authentication (2FA) for Office 365
  
• Configure Single Sign-On (SSO) for Office 365
  
• Office 365 SSO, MFA & Provisioning
  
• Risk based Authentication
• How to block email access at work?