Objective:

• Adding new User
• Inviting User who shares email with an existing Clio User 

Environment:

• Clio Manage

Additional Information:

• If a the new Firm Member is sharing an email inbox with another User who already exists you're able to invite them to Clio with their personal email address or an alias work email address

Answer:

No. Clio requires an email address as a login credential. This is a required field when inviting new Users to the Account.