If the employee has a 457(b) account, but not a 401(k) account, a 401(k) account will be opened for the employee. The account number and online access is the same for all account types.
Please remind employees that these are considered two separate accounts as far as elections and changes. For example, changes made to investment elections and/or contribution amounts made to the 457(b) account will not be reflected in the 401(k) account. Similarly, beneficiary elections need to be made for each IRS plan type and can be different for both plans.