Microsoft Entra ID SSO

This guide walks you through setting up SAML Single Sign-On between Microsoft Entra ID (formerly Azure Active Directory) and Probo.

Prerequisites

• Microsoft Entra ID administrator access (or Application Administrator role)
• Probo organization administrator access
• Your Probo domain (e.g., probo.example.com)
• Access to your DNS settings for domain verification

Prepare Probo Information

Before configuring Microsoft Entra ID, gather these Probo service provider details:

Field	Value
ACS URL	https://your-probo-domain.com/api/connect/v1/saml/2.0/consume
Entity ID	https://your-probo-domain.com/api/connect/v1/saml/2.0/metadata

Replace your-probo-domain.com with your actual Probo domain.

Domain Verification

Before configuring anything else, you must verify domain ownership:

1. Log in to Probo as an organization administrator
2. Go to Organization Settings → Authentication → SAML
3. Click Verify Domain (if no configurations exist yet, this option will be available)
4. Copy the provided TXT record value
5. Add a TXT record to your domain’s DNS settings:

   Type: TXT
   Name: _probo-domain-verification.your-company.com
   Value: [Verification token from Probo]
   TTL: 300 (or your DNS provider's default)

6. Wait for DNS propagation (usually 5-15 minutes)
7. In Probo, click Complete Verification
8. If successful, the domain status will show as “Verified”

Configure Microsoft Entra ID

1. Sign in to the Microsoft Entra admin center

2. Go to Identity → Applications → Enterprise applications

3. Click New application → Create your own application

4. Enter Probo as the application name

5. Select Integrate any other application you don’t find in the gallery (Non-gallery)

6. Click Create

7. In the application overview, go to Single sign-on → select SAML

8. In Basic SAML Configuration, click Edit and configure:

   Field	Value
   Identifier (Entity ID)	https://your-probo-domain.com/api/connect/v1/saml/2.0/metadata
   Reply URL (Assertion Consumer Service URL)	https://your-probo-domain.com/api/connect/v1/saml/2.0/consume
   Relay State	[SAML Configuration ID] (optional - see note below)
   Sign on URL	https://your-probo-domain.com (optional)

   Important: The Relay State is optional but if you want to support IdP-initiated login flows, it MUST be set to your exact SAML configuration ID (not a placeholder). If set incorrectly, SSO will not work. You’ll get this ID after creating the SAML configuration in Probo. You can initially leave this empty and update it later with the exact configuration ID.

9. Click Save

10. In Attributes & Claims, click Edit and configure the following claims:

    Claim name	Source attribute
    email	user.mail
    firstName	user.givenname
    lastName	user.surname

    To add each claim:

    • Click Add new claim
    • Enter the claim name (e.g., email)
    • Set Source to Attribute
    • Select the corresponding Source attribute
    • Click Save

    Also verify that the Unique User Identifier (Name ID) is set to user.userprincipalname or user.mail with the format Email address.

11. In SAML Certificates, download the Certificate (Base64) and copy:

    • Login URL (this is the IdP SSO URL)
    • Microsoft Entra Identifier (this is the IdP Entity ID)

12. Go to Users and groups

13. Click Add user/group

14. Select users or groups that should have access to Probo

15. Click Assign

Configure Probo

1. Log in to Probo as an organization administrator

2. Go to Organization Settings → Authentication → SAML

3. Click Add SAML Configuration

4. Configure the basic settings:

   Field	Value	Notes
   Email Domain	your-company.com	Your organization’s email domain
   Enforcement Policy	OPTIONAL	Recommended for initial setup

5. Configure the Identity Provider settings with values from Microsoft Entra ID:

   Field	Value	Notes
   IdP Entity ID	[Microsoft Entra Identifier]	Copy from Entra ID setup
   IdP SSO URL	[Login URL]	Copy from Entra ID setup
   IdP Certificate	[Certificate (Base64)]	Paste the downloaded certificate content

6. Configure the attribute mappings:

   Field	Value	Notes
   Email Attribute	email	Maps to user email
   First Name Attribute	firstName	Maps to user first name
   Last Name Attribute	lastName	Maps to user last name
   Role Attribute	[Leave empty]	Unless you’ve configured custom claims

7. Configure user settings:

   Field	Value	Notes
   Auto Signup	Enabled	Allows new users to sign up automatically via SSO

8. Click Save Configuration

9. Copy the SAML Configuration ID that appears after saving (e.g., saml_config_1a2b3c4d)

Update Entra ID Relay State

Return to Microsoft Entra ID to enable IdP-initiated login:

1. Go to your Probo enterprise application in the Entra admin center
2. Click Single sign-on → Edit Basic SAML Configuration
3. In the Relay State field, enter your SAML configuration ID
4. Click Save

Troubleshooting

”AADSTS75005: The request is not a valid Saml2 protocol message” Error

• Cause: Incorrect Reply URL or Entity ID configuration
• Solution: Verify that the Reply URL and Entity ID in Entra ID exactly match your Probo configuration:
  • Reply URL: https://your-probo-domain.com/api/connect/v1/saml/2.0/consume
  • Entity ID: https://your-probo-domain.com/api/connect/v1/saml/2.0/metadata

”AADSTS50105: User not assigned to application” Error

• Cause: User has not been assigned to the Probo enterprise application
• Solution: Go to the enterprise application → Users and groups → assign the user or a group containing the user

”AADSTS700016: Application not found” Error

• Cause: Incorrect Entity ID in Probo or application not properly configured
• Solution: Verify the Microsoft Entra Identifier matches the IdP Entity ID configured in Probo

Attributes Not Mapping

• Cause: Claims not configured correctly in Entra ID
• Solution: Verify that custom claims are configured with exact names: email, firstName, lastName. Check under Single sign-on → Attributes & Claims

”Invalid RelayState” Error

• Cause: Incorrect Relay State configuration
• Solution: Ensure Relay State is either empty or set to the exact SAML configuration ID from Probo

Debugging Steps

Check Entra ID Sign-in Logs

1. Go to the Entra admin center → Identity → Monitoring & health → Sign-in logs
2. Filter by the Probo application
3. Click on a failed sign-in attempt to view error details and troubleshooting recommendations

Test SAML Response

1. In the Probo enterprise application, go to Single sign-on
2. Click Test this application
3. Review the SAML response for errors

Advanced Configuration

Custom Claims

To map additional Entra ID user attributes:

1. In the enterprise application, go to Single sign-on → Attributes & Claims
2. Click Add new claim
3. Map additional directory attributes as needed
4. Update the corresponding attribute mappings in Probo

Conditional Access

Control access using Microsoft Entra ID Conditional Access policies:

1. Go to Identity → Protection → Conditional Access
2. Create a new policy targeting the Probo application
3. Configure conditions (location, device, risk level, etc.)
4. Set appropriate access controls (grant, block, require MFA)

Group-Based Access

Restrict access using Entra ID groups:

1. In the enterprise application, go to Users and groups
2. Assign groups instead of individual users
3. Manage access by adding/removing users from the assigned groups

For detailed troubleshooting and advanced configuration options, see the SSO Overview guide.