When you work with cloud tools, small details can turn into big roadblocks. One piece of information that people often get stuck on is the Microsoft 365 tenant name. Whether you are trying to connect a new third-party app, setting up a backup tool, or working with IT support, you will eventually be asked for this name.
The good news? Finding it is incredibly easy. This guide breaks down exactly what a tenant name is and three simple ways to find yours in less than two minutes.
What Is a Microsoft 365 Tenant Name?
A tenant is a dedicated instance of Entra ID associated with an organization’s Microsoft 365 environment. When the tenant is created, Microsoft assigns it an initial .onmicrosoft.com domain based on the tenant name selected during setup. This domain remains associated with the tenant even after custom domains are added.
For example:
- Tenant name: contoso
- Initial domain: contoso.onmicrosoft.com
- Custom domain: contoso.com
Users may sign in with a custom domain such as user@contoso.com, while the contoso.onmicrosoft.com domain continues to exist as the tenant’s initial Microsoft-provided domain.
How to Find Tenant Name in Microsoft 365
Depending on your tech skills and access level, choose one of the three methods below to grab your tenant name.
Method 1: Find the Tenant Name in the Microsoft 365 Admin Center
As a Microsoft 365 administrator, you can find he tenant name directly from the admin center.
- Sign in to the Microsoft 365 admin center with an administrator account.
- From the left navigation pane, go to Settings > Domains.
- Locate the Microsoft-provided domain that ends with .onmicrosoft.com.
- The value before .onmicrosoft.com is your tenant name.
For example, if the domain is contoso.onmicrosoft.com, the tenant name is contoso.
Method 2: Find Tenant Name in Microsoft Using PowerShell
If you prefer working from the PowerShell console, you can use the Microsoft Graph PowerShell module to find your Microsoft 365 tenant’s initial domain name. Run the following commands.
Connect-MgGraph -Scopes "Domain.Read.All"
(Get-MgDomain | Where-Object {$_.isInitial}).Id The output will typically look similar to: contoso.onmicrosoft.com
Method 3: Find the Microsoft 365 Tenant Name Using EasyEntra
If your Entra ID tenant is already configured in EasyEntra, you can view its tenant name directly from the Connection Manager. You can view your tenant name directly from the management interface by following the steps below.
- Open EasyEntra and go to Connection Manager > Entra ID.
- Locate the required Entra ID connection in the list.
- Check the Tenant Name column to find the tenant name.
- You can also view the associated Default Domain and Tenant ID from the same screen.
Locating your tenant name is simple, and tools like EasyEntra make it even easier by letting you skip the browser and code altogether.
