Score the ham in a diamond pattern by using a sharp knife and cutting 1/2 inch down in the fat or rind sides, if it’s not already done.
Add the ham to the crock pot.
In a bowl add the orange marmalade, maple syrup, mustard, and seasonings. Microwave 30 seconds to 1 minute until the marmalade is melted. Stir the glaze and pour over the ham.
Cook on low 4-5 hours or high 2- 2 1/2 hours, basting halfway through.
Let the ham rest on the cutting board 10 minutes before slicing.
Add slices to a serving plate and pour the remaining sauce from the slow cooker over the ham.