Where can agencies find the "Company Login IDs" of their companies?

Agencies can find the "Company Login IDs" in the list of companies and in a company profile.

Go to My Account > Companies. The "Company Login ID" will have below the relevant ID in front of the Company you select.

You can also see the "Company Login ID" when you are editing a company.

The "Company Login ID" is also present when you export your companies.

And the "Company Login ID" is also present when you export your company users.