Allow me to share some details about adding a user in QuickBooks Desktop.
The email address field when adding a user is to let the invited person to be informed from QuickBooks that he or she was added as a user in your company. That email contains an invitation. If they accept it, you will successfully add them. If not, it will not be possible.
I appreciate you for taking the time to post here in the Community. I can provide some clarification about adding a user in QuickBooks Desktop.
There are specific roles that will require the user's email address to create and link an Intuit account. These include Accountant, External Accountant, Finance, Full Access, Payroll Manager, Payroll Processor, and View Only roles.
Currently, the option or keystroke to disable thefield is unavailable. The only way to successfully add the user is to include the email address.
I appreciate your input on this feature. As we assess this, I suggest you visit our New Features section (Help > New Features) within QuickBooks to stay updated with all the changes that are being made.