Employee and Employer Contributions
The Stride Autism Centers, P. P. 401(k) Plan likely includes both employee contributions and employer matches. While the employee’s own contributions are usually 100% vested and can be divided without issues, employer contributions often follow a vesting schedule.
Your QDRO needs to specify whether the division includes only the vested portion or also extends to unvested funds. If you try to claim unvested employer contributions prematurely, it could cause delays or rejections from the plan administrator.

