How to Find Microsoft 365 Tenant ID: A Quick and Easy Guide
If you are about to submit a Microsoft 365 support ticket, one thing that you need is a Tenant ID. So, if you don’t know how to find the Microsoft 365 tenant ID, it can be quite challenging to get the right help for your problem.
Moreover, ever since Microsoft retired its Azure AD and made the UI overhaul to Entra ID, admins have still not figured out each and every menu option. Making the simple tasks of Tenant ID discovery quite challenging.
To solve this issue once and for all, I have assembled a series of methods that will help you find what you need. First, let us see what exactly we are looking for.
What is Microsoft 365 Tenant ID?
As soon as you subscribe to an Office 365 plan or get any Microsoft cloud service, for that matter, Microsoft generates a dedicated instance unique to your organization. This instance is what we call a Tenant (because you are merely renting out these services, not owning them yourself).
To make sure that each Tenant can be identified separately from the others, there exists a 32-character alphanumeric code (a Global Unique Identifier or GUID for short).
(e.g., 1a2b3c4d-5e6f-7g8h-9i0j-1234567890ab).
It consists of hexadecimal strings (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f) that are sort of the address of your specific cloud instance.
These are immutable, meaning you can’t change them once they are generated. Such is the strictness that the Tenant ID persists even when you transfer an Office 365 subscription to another account or remove a domain from an Office 365 tenant.
Now that we know what it is, let’s see why the admin must have it at their disposal at all times.
Why Admins Need to Find Microsoft 365 Tenant ID?
On the surface, a Tenant ID may not appear too useful. A string of characters that don’t follow any pattern or logic, but that’s where you are mistaken.
A Tenant ID serves as the primary identifier.
Now, let’s go through the identification process one by one.
Method 1: Use Entra Admin Center to Reveal the Tenant ID
My personal favorite choice. This is the most reliable way for any admin who has Entra ID access. Just follow these steps.
- Step 1. Log in to the Microsoft Entra admin center.
- Step 2. In the left-hand menu, you will see the Entra ID option. Select it and stay on the Overview Tab.
- Step 3. Look under the Basic information section, you should see a Tenant ID field.
- Step 4. Click the Copy to clipboard icon and paste it into Notepad or any other text viewer to see the Tenant ID.
If you are not comfortable with Entra or lack the credentials, then move on to the next method.
Method 2: Find Microsoft 365 Tenant in the M365 Admin Center
Admins have been using the admin center for all sorts of user and resource management tasks. Getting the Tenant ID is just another one of them, so to do that, here is the process:
- Step 1. Inside the M365 Admin Center, toggle Settings, then Org Settings.
- Step 2. Click on the Organization profile tab and select the Tenant Information (It may be named as Organization information depending on your layout view).
- Step 3. Your Tenant ID will be visible for copying.
Those who prefer the sleek nature of scripting over the multi-menu GUI, I have an excellent alternative.
Method 3: PowerShell
The process is simple. Just remember to open the PowerShell instance in admin mode.
- Step 1. Connect to Microsoft Graph by running: Connect-MgGraph
- Step 2. Authenticate, and type: Get-MgOrganization | Select-Object Id, DisplayName
- Step 3. Your Tenant ID will be present under the ID column.
Conclusion
Now you know exactly how to find the Microsoft 365 Tenant ID on your own. I shared with you the top 3 ways an admin can use to get their Tenant identifier, including the Entra ID, M365 Admin Center, and the PowerShell Commands. Use any of them to get the data you are looking for. If your intent behind finding the tenant is to eventually move it, then I suggest you get the FreeViewer Office 365 Tenant Migration Software.
You can get a free demo version of the software today.
A free copy is available right now to try for up to two users.
Frequently Asked Questions
Q: Can there be two identical Microsoft 365 Tenant IDs?
No, there are 340 undecillion possible combinations that a Microsoft 365 Tenant ID can take. Moreover, the algorithm used to generate these IDs is made in such a way that there can never be two M365 Tenants with the same ID. If you think that two Tenant IDs are the same, check again; you might be confused because of homoglyphs.
Q: Should I keep the Microsoft 365 Tenant ID a secret after finding it?
Not necessarily, Tenant ID is not as sensitive a data point as a user credential. Moreover, anyone who pings your company URL can get the Tenant ID. So no need to put any extra effort into keeping it secret.
Q: Is it possible to find the tenant name once I have the M365 tenant ID?
Yes. If you have the ID but need the original .onmicrosoft.com name, you can use the PowerShell command Get-MgOrganization (as shown above) to view the DisplayName and verified domains associated with that specific ID.
Q: Does it cost anything to find O365 Tenant IDs?
No, finding a tenant is absolutely free, no matter which method you use.
Q: Will the M365 tenant ID change if I alter user mailboxes?
No, the Tenant ID is unchangeable.