Resetting ImmutableID in Azure AD: A Complete Guide Using Microsoft Graph PowerShell (Hard Match with MG-Graph)

Managing user identities in hybrid environments often involves resolving sync issues between on-premises Active Directory and Azure AD. One key troubleshooting task is updating or resetting the ImmutableID (also called OnPremisesImmutableId). This guide provides a step-by-step breakdown of essential Microsoft Graph PowerShell commands.

🛠 How to Install Microsoft Graph SDK

✅ 1. Open as Administrator
Search for , right-click, and select “Run as Administrator”.

🧩 2. Install the SDK Using
Run the following command:

Install-Module Microsoft.Graph -Scope AllUsers

🔒 If prompted to trust the repository (PSGallery), type Y and press Enter.

✅ Optional: Install Specific Modules Only (Advanced)
If you want to install only specific Graph modules (like Users, Groups, or Identity), you can install them individually:

Install-Module Microsoft.Graph.Users
Install-Module Microsoft.Graph.Identity.DirectoryManagement

🔍 3. Verify the Installation
After installation, run:

Get-Module Microsoft.Graph* -ListAvailable

You should see a list of installed Microsoft Graph modules.

1. Connect to Microsoft Graph

Connect-MgGraph

Why: Establishes a session with Microsoft Graph API, which is required for managing users in Microsoft 365/Azure AD.

🔐 For full access:

Connect-MgGraph -Scopes “User.ReadWrite.All”, “Directory.ReadWrite.All”, “Directory.AccessAsUser.All”

✍️ 2. Set the OnPremisesImmutableId

Update-MgUser -UserPrincipalName Welcome21.Doe@contoso.com -OnPremisesImmutableId “0Nf0Uj5XXk+qZ/6ZhBCypA==”

Replace UPN and Immutable ID. Its is been Done for Hard Match.

Why: Manually sets the ImmutableID used by Azure AD to link the user to their on-prem AD identity.

🗑️ 3. Clear the ImmutableID (Unlink from On-Prem)

Update-MgUser -UserPrincipalName Welcome21.Doe@M365x91864288.onmicrosoft.com -OnPremisesImmutableId $null

🆚 Old method (deprecated):

Set-MsolUser -UserPrincipalName Welcome21.Doe@M365x91864288.onmicrosoft.com -ImmutableId $null

Why: Used to disconnect the cloud account from its on-prem identity. Often necessary before merging accounts or re-linking.

🔁 4. Start Azure AD Delta Sync

Start-ADSyncSyncCycle -PolicyType Delta

Why: Immediately pushes local AD changes to Azure AD. Essential after modifying ImmutableID.

🔍 5. Get User Info with Microsoft Graph

Option 1: Basic query

Get-MgUser -UserPrincipalName Welcome34.Smith@M365x91864288.onmicrosoft.com

Why: Displays user object and sync status.

✅ Option 2: Formatted view with Get-MgUserByUserPrincipalName

Get-MgUserByUserPrincipalName -UserPrincipalName abc@milanday.com | fl

Why: Returns detailed user properties in a **formatted list** (`fl` = `Format-List`) view. Excellent for verifying ImmutableID and sync state.

🛠️ 6. Find Permissions Needed for Graph Commands

Find-MgGraphCommand -Command Get-MgUser | Select -First 1 -ExpandProperty Permissions

Why: Quickly shows which **Graph API permissions** are required to run specific commands.

🧽 7. Clean Your Console (Optional)

clear

Why: Clears window for improved visibility when working with multiple outputs.

✅ Summary

Whether you’re fixing sync problems or managing cloud-only users in a hybrid environment, these Microsoft Graph commands offer a modern, secure way to manage identities. Transitioning from legacy `MSOnline` commands to **Microsoft Graph SDK** ensures future-proof and compliant administration.

🔑 Takeaways:

Always start with `Connect-MgGraph`.
Use `Update-MgUser` or `Get-MgUserByUserPrincipalName` for granular identity management.
Replace `Set-MsolUser` with Graph SDK equivalents.
Use `Start-ADSyncSyncCycle` after ImmutableID changes