There are no rules in the legislation that allows for exemptions from the requirement of domicile and residence in Denmark immediately before the beginning of an education.
However, it is your a-kasse which, in first instance, must specifically decide whether the requirement for domicile and residence immediately before the beginning of an education is met. Unfortunately we dont have experience with similar cases like yours - so all we can say at this point is that you must rely in your A-kasse, that they are reasonable in their administration of the legislation.
We will now investigate further about your question. The main rule/requirement is clear that you have to had stay in Denmark at least one day before start of education. But we now ask our partners if there is any possible exception in the case it's not your own fault that you (could) not move before you got answer from University. Please be patient.
In the meantime, we recommend that you join an A-kasse. You will not have to pay before you are graduated - so you will not loose anything by a membership.
I don't think the A-kasse will ask you now. They will wait until they have to pay benefits (dagpenge) to check if you meet requirements, ie the requirement about stay in Denmark.
We will be back as soon as possible.