Can user login under same user id which email address for different company

Welcome, @account6!

You can add a user to multiple companies with the same email address. Because a user can be invited only using one email address to access multiple companies.

But please know that a user can only have a single user ID since a user ID is equal to a single email address.

To do so:

1. Go to the Gear icon.
2. Under Your Company, select Manage User.
3. Tap Add user.
4. Enter the name and email address of the user you wanted to invite.
5. Click Save.

Here's an article you can read to learn more about how you can add and manage a user's access: Add, delete, or change user access.

Keep me posted in the comment section down below if you have any other questions. I'm always around happy to lend a helping hand.