The Verbit platform currently does not permit the same "exact" username to be shared across multiple accounts. When such is attempted, the admin adding the user on a second account will get an error saying: Email has already been taken and will not be allowed to proceed.
Example: Adding firstname.lastname@example.org to another account generates the error below.
In general, Exchange/MX servers ignore all characters preceded by the + symbol when routing emails.
i.e. email@example.com, firstname.lastname@example.org, and email@example.com shares the same mailbox which is firstname.lastname@example.org
Verbit users can exploit this Internet property to add the same username in multiple accounts and still virtually link the accounts to a single email address.
The user will need to log in using the exact username defined for secondary accounts.
In the above example, logging in using email@example.com will open the account Company1, and using firstname.lastname@example.org will open account Company2.
When a job gets completed on Company 1, Company 2, or Company 3, the email notification from the accounts will be sent to the same mailbox, email@example.com
NOTE: Some Exchange servers can be configured to treat the + symbol as a valid character, making this trick fail.