Although the terms of probation can be expected to prohibit relocation to another state without permission, it is only necessary for the other state to grant permission if the probation is transferred to that state. Sometimes it is possible to get permission to relocate with remote reporting (e.g., by phone or by mail), without any need to transfer probation and thus no need for permission from the destination state.

It would be sensible, to the extent possible, to complete all requirements of probation before seeking permission to move, including the required classes as well as payment of fines and other assessments. The more you have already done, the more likely it is that a probation officer will entertain your request.

Your comment, "ahead of her court date", indicate that she has not yet been sentenced. If not, then she should discuss with her criminal defense lawyer her hope that she can move to Michigan such that the issue can be addressed with probation and the court before she is sentenced.