Good afternoon, @justonwo. 

Thanks for hopping into the Community with your question about passwords and MFA requirements for your users. 

When your team (users) creates a password, they'll need to have these requirements to save the information successfully: 

Combo of:

• Letters
• Numbers
• Special Characters

It must be at least eight characters long as well. This is already set for all users by our system. 

With QuickBooks, MFA is a one-time confirmation code through your email or mobile device when you try to log in. MFA is default to ON. However, you can choose to set up two-step verification for each user as another option. 

To see which would be best for your business and other details, review this guide: Verify your QuickBooks Online account with mult-factor authentication or two-step verification. 

Don't hesitate to come back if you have any further questions about passwords or MFA. I'm always here to lend a helping hand. Bye for now!