How do I find the immutable id of my Google Apps account?

Question

Many of the Directory API calls require a customer parameter referred to as the \"Immutable id of the Google Apps account. (string)\".

e.g. GET http

Answer 1

Had the same question, so I had to contact their chat support.

The official answer was:
There are no any web interface to look up this information - as I would expect for example in "organisation admin panel". The only way to get this information is from the code.

You have to write extra code to request information about any existing user:
(Link to API Docs - GET: https://www.googleapis.com/admin/directory/v1/users)
And in the response, you can find field customerId which is the same for each user in the company across all domains.

That is the only way to find your organisation customerId...

Not user-friendly, so I will submit "Feature Request" right now to Google.