How do you find the tenant ID?

Rohit404404
Brass Contributor
May 07, 2019
Sebastien Crevier

This embarrassing, but what do we enter in the box, i tried tenantname.sharepoint.com , no luck

Sebastien Crevier wrote:
There are a lot of ways to do that but none of them are really simple...

Our team got tired of looking everywhere for those tenant Azure & Office 365 IDs so we built an online tool to easily find them by typing in their respective domain.

Hope it might help others too.

https://www.whatismytenantid.com
- Eric Adler
  Iron Contributor
  May 07, 2019
  Rohit404404I found another location. If you are a global tenant admin. go to the admin center and click on Reports > Usage and in the bottom left corner you will see an "ad" for the Power BI M365 usage app and it has the tenant ID right there for you to use. it is required for the Power BI app to work
- Eric Adler
  Iron Contributor
  May 07, 2019
  while logged in as a global tenant admin go to https://portal.azure.com in the left navigation you will see Azure AD. Click on that. In the Azure AD menu look for "Properties" there is the Directory (tenant) ID there with a "copy" button.
rrelyea
Copper Contributor
Feb 02, 2019
as of 2/2/2019, that web site is having SSL cert problems.
- Sebastien Crevier
  Brass Contributor
  Feb 05, 2019
  Thanks for letting me know, it has been fixed.
edwardsdna
MCT
Aug 10, 2018
The tool works like a charm. Like hitting the Big Red Easy button ;) Thanks Sebastien.
SN N
Copper Contributor
Aug 01, 2018
But why Microsoft is exposing this? If i give a domain name i am getting the Tenantid, is it not against security? Isnt it should be confidential?
Curtis Johnstone
MVP
Feb 10, 2018
Hi Sebastien, that little tool is interesting. What are querying to get that info? No creds are required so it must be a public source, is there a DNS records containing the TenantID ?

Thanks,
- Sebastien Crevier
  Brass Contributor
  Feb 12, 2018
  Hi Curtis, yes we are getting that info from the OpenID Connect configuration endpoint which maps domain names to tenant IDs.
  - Curtis Johnstone
    MVP
    Feb 12, 2018
    Thanks Sebastien. Interesting. For the benefit of others, OpenID Connect is a simple identity layer that sits on top of OAuth 2.0. For Office 365 there is an OpenID Connect metadata document for each tenant which contains more of the information required for apps to perform sign-in's (including the tenant id).
    
    This is a publically accessible document available for every tenant and is available here: https://login.microsoftonline.com/{tenant domain name}/.well-known/openid-configuration.
    
    That document is returned in JSON and Sebastien's tool makes it easier to read - it extracts just the associated tenant id.
    
    Curtis

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