Every decent admin-account has MFA enabled to log on into the Azure or Office365 Portal. It is important to enable this, no doubt about that.
But what if the Azure MFA is not working at the time you need it?
In 2018 this happened a few times, see this article and this article. So I found some blogs on how to setup an emergency account, but I also configured Microsoft Cloud App Security to send me notifications when this account is used.
This inspired me to write a blog post on how I did this.
This post will be divided in 6 topics:
- What do we need
- Create account
- Disable MFA
- Configure Identity Protection
- Configure MCAS
This will be a long blogpost, so there will be two parts on how to set this up.
Let’s start with part 1. Create the account and configure MFA.
1. What do we need?
First of all, we need the following features of AzureAD:
- Multi Factor Authentication
- Microsoft Cloud App Security
- AzureAD Identity Protection
MCAS is a features of AzureAD P1 and Identity Protection is a feature of AzureAD P2. So if you have AzureAD P2, then you are settled. But it is possible to buy seperate AzureAD licenses and you can use it for eg. only your tenant admin-accounts.
Below you will find some security and configuration guidelines for the emergency account.
- Should have a complex password
- There should be a list of admins that are allowed to use this account
- Preferable at least 2 accounts in your tenant
- Store the passwords in a safe place intern or extern your company
- Monitor the sign-ins -> We will do this with MCAS
- Must have the Global Administrator role assigned
- Must have password set to never expire
- Must not have MFA configured
- Must be excluded from ALL Conditional Access policies
- Must be a cloud-only account
- Should use the tenants *.onmicrosoft.com domain
- Should not be synchronized with on-prem AD
- Should not be connected with any employee-supplied mobile phones or hardware tokens.
3. Create Account
- Go to the Azure Portal -> Azure Active Directory -> Users
- Create a breaktheglass account and make sure you use yours tenant domain (@yourdomain.onmicrosoft.com) as UPN
- Give the newly created user the Global Administrator Role
- Copy the new user name and the new generated password to your favorite text editor, because we need this in the next step
Open a new InPrivate browser and logon with the new breaktheglass account
Change your password and follow the MFA configuration. We will later turn off the MFA for this account.
Sign out from the breaktheglass account and close the browser
Run this powershell command to set the password to never expire
Set-MsolUser -UserPrincipalName firstname.lastname@example.org -PasswordNeverExpires $true
4. Disable MFA
- Go back to the Azure Portal and sign in with your global administrator account
- MFA will be triggered with some Conditional Access rules. Exclude this account in all the Conditional Access rules which you have created. In my example, I created a rule to force MFA on all Administrator accounts. Edit this rule and go to -> Users and Groups under Assignments -> Exclude -> Select Excluded Users and search for the breaktheglass account.
- Click on Select and then click Done and Save the rule
5. Configure Identity Protection
Identity Protection is included in AzureAD P2. So we have to exclude the breaktheglass account here also.
- Open the Identity Protection blade
- Here you will see 3 options under Configure: MFA Registration, User Risk Policy and Sign-in Risk Policy
These policies are disabled by default, but we need to exclude the breaktheglass account within these policies and enable then afterwards.
- Open the MFA Registration blade -> Users -> Include all users and exclude the breaktheglass account -> Click on Done
- Under Access -> Check if Require Azure MFA registration is checked
- Enable the policy and save it.
Repeat steps 13, 14 and 15 for the User Risk Policy and the Sign-in Policy.
Now we go further on part 2 of this setup. Configure MCAS.