Q.  Is it true that after the fall of mankind Satan still had access to heaven and there participated in the meetings with angels?

A.  No. The moment Lucifer himself fell, he was judged and cast out of heaven. He became Satan, the adversary of God.

Those who believe that Satan has or even had access to heaven have misinterpreted the term “sons of God” as angelic beings in the following three verses found in the Book of Job:

JOB 1:6  Now there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them.
JOB 2:1  Again there was a day when the
sons of God came to present themselves before the LORD, and Satan came also among them to present himself before the LORD.
Job 38:4-7: "Where wast thou when I laid the foundations of the earth? declare, if thou hast understanding...When the morning
stars sang together, and all the sons of God shouted for joy?"

The term “sons of God” is never used for angelic beings in Scriptures.  The angels were not created to be sons of God; they were created to be servants of God.  There is no “Father-son” relationship between God and the angels. The angels stand before God as His servants and He their Owner-Master. They were created as ministering spirits. 

The term "sons of God" actually denotes the special relationship of man to God — as His children.  Furthermore, such terms as "Father" and "son" do not only show the existence of a relationship but also the ability to procreate"Be fruitful, and multiply..."  But the angelic beings were not created to procreate.  Being spirits, they are always portray as "men", never as "women" and they are asexual, sexless (Mark 12:25).  In the Scriptures they are often called "stars" (Job 38:7; Dan.8:10; Rev.1:16a, cf. 1:20; 8:12; 9:1).

The two verses of Job (1:6; 2:1) speak not of a scene in heaven where all holy angels were gathered before God and Satan, the evil one, came also among them right in the very abode of God. But rather it speaks of a scene on earth where true “sons of God”, true worshippers, gathered to present themselves before God and the evil one came also among them. The true worshippers of God in Job’s days gathered themselves before God on certain days just like the true worshippers of God do so today.  And it was just such a day that Satan sat on someone in the congregation to accuse Job.

Yes, in every congregation, demons do sit and bide their time to bring about false accusations against some saints of God. Show me that it is not true that demons go to church, that they do get a ride in certain church-goers. Show me that it is not true that the evil one is working in the midst of the congregation of the church.

Heaven is God’s abode, sins have no place there.  Satan was cast out of the heaven (abode) of God, that is, he was ejected from heaven. So were all those angels who took side with him, for they warred against Michael and his angels in heaven in those days (cf. Rev.12:7). None of these fallen angels could enter the heaven of God again.  They lost their estates in the heavenly places and became earth bound. They fell from heaven, so to speak (Lk.10:18). They no longer have direct access to God's Throne.

The Devil is yet to be cast down to the ground (cf. Rev.12:10; Ezek.28:17). That is, he will be brought to naught. Today, the Devil is embodied in a mass of religious people throughout the whole religious system. And particularly through the religious Roman system Satan continues his war against God and His people. Satan is fighting a losing battle and he will soon be destroyed.