New Desktop Underwriter User Interface
The redesigned Desktop Underwriter® (DU®)/Desktop Originator®(DO®) user interfaces (UIs) feature an updated look and feel and support the redesigned Uniform Residential Loan Application (URLA) (Fannie Mae Form 1003).
The new UIs will only accept and access submissions of loans using the redesigned Form 1003/DU MISMO V. 3.4 format. All new loans dated on or after May 1, 2021, must be submitted using the updated formats. Any existing loans in the 1003 3.2 or MISMO V. 2.3.1 formats should be accessed and re-submitted in the classic version of DU/DO (accessible on the DU webpage).
For more information on legacy file re-/submission deadlines, see the Mandate and Implementation Timeline section of the Redesigned Form 1003/DU Quick Guide.