They evaluate more than one degree. I have sent my MS and BE transcripts for evaluation.
When creating your express entry profile, if the dependent’s education is added, the evaluation would be required. It is advisable to get evaluation done for both and the highest education be added for both since it would help in getting more points. Irrespective of whether your husband uses his MBA education, you should add the highest degree that you have earned.
Create a WES account and enter all the required data to see what documents need to be provided for each of your universities. Your husband would need to create a similar profile too and follow the same process. Once you enter your degree and university information, they tell you whether you need to submit the transcripts and certificate both or if just the transcripts are enough. For my Indian degree, I had to submit transcripts and degree certificate copy but for my US degree, they wanted just the transcripts.