The need for probate when there is a trust in place depends on various factors.

In many cases, having a trust can help avoid probate because the trust assets are typically held outside of the probate process. When someone passes away and they have a properly funded trust, the assets held within the trust are distributed according to the terms of the trust, without the need for probate court involvement.

As the trustee of the trust, it is generally your responsibility to administer the trust and distribute the assets according to the instructions outlined in the trust document.

However, usually there is property that was not transferred to the trust.  It is common and recommended that at the time the trust is made, a Pour Over Will or other will is made to cover this potential. Whether actual probate will be required in Mississippi will depend on the value of the property outside the trust and other factors.