Freewill in Heaven.
God at some point suspended or allowed the Angels to exercise freewill. At this time Lucifer desired more desired more honor than he deserved, and led other Angels away who either had the same desire, or were complicit in giving Lucifier more honor than what he was owed. At this time Angles could rise or fall in their station according to obedience (love) to God, and proper response in their relationship with each other. Thus, Michael “The Archangel” holds a position that is above is choir. The same is true of Raphael, and Gabriel. And, Angles that were Seraphim and Cherubim have fallen below the choirs of Powers, Principalities, Archangels, and Guardian Angels etc.
After the time of testing or trial the Angles fixed in the dignity and glory in relationship to God. As we make our decisions in time, therefore change, as that is what time is the measurement of change. The Angels after the test made their decision without change outside of time. Therefore it is permanent. To say they have had or will have freewill is to place the decision in time/change. The Angles made their decision once for all if you will and never looked back. It is not subject to change. This is one reason why scripture shows Satan as ever vigilant roaring about like a lion. He has not lost energy or desire and will never. At his fall he is the same. The same mission the same intensity and desires. The same is with all the Angels.
When we die will be judged once and for all. There is only one judgement for salvation, and that occurs at the moment we die. It is then will be judged to Heaven or Hell. If Heaven and you are perfect with no attachment to sin whatsoever you will enter Heaven, and if you do have attachment to sin you will be cleansed of that before entering Heaven. The bathing or cleansing process is known as Purgatory.
When we die the state we are in at that moment (before judgement) is the everlasting act of our freewill. As sound goes forth and does not stop. Our dignity and glory aka our closeness to God is not remeasured. We enter into eviternity to be technical. As eternity is strictly speaking an expression of state reserved to God alone.
To sum up all persons (God, Angels and Humans) have freewill in Heaven. That freewill is as one poster stated outside of time or change, and therefore is not altered or diminished in any way. This is also why in the OT you find prophets requesting God not to send his Angels because Angels do the will of God and are not persuaded to be altered. We on the other hand in this life do not see Justice and Mercy perfectly, and will “negotiate” with God, and perform His will in part, but in the afterlife in full.