Question

The following error appears while trying to add a user to a new organization:

403 User already exists in another account.

Answer

You can create a second Fivetran account using an alias. For example, if the current user is user@fivetran.com; a workable alias would be user+1@fivetran.com.

You can also use email+customerName@domain.com as a unique email alias.

Note: Some email clients do not support aliases.

Cause

As of April 21, 2021, Fivetran does not allow the same email address to be used across multiple accounts.