This is not an open and shut case. Consider the evidence:
At the time of greatest tribulation ever the angel-prince Michael shall contend for Daniel’s people. Everyone that is found written in the book shall be saved, and the dead shall rise again, some to everlasting life, some to everlasting shame (Dan. 12:1–3; cf. Is. 9:6, 7; 25:7, 8 Sym; cf. Matt. 24:21, 29-31). He is the prince of Jehovah’s army (Dan. 8:11; cf. Josh. 5:13-15), the prince and protector of God’s people (Dan. 10:21; 12:1). The spirit person who bears the name Michael is referred to as “one of the chief princes,” “the great prince who has charge of your [Daniel’s] people” (Dan. 10:13, 21; 12:1).
Since Michael is a prince and protector of God’s people, he could be identified with the unnamed angel that God had sent ahead of the Israelites: “Here I am sending an angel ahead of you to keep you on the road and to bring you into the place that I have prepared. Watch yourself because of him and obey his voice. Do not behave rebelliously against him, for he will not pardon your transgression; because my name is within him” (Ex. 14:19; 23:20, 21; cf. 1 Cor. 10:1-4). This reminds one of the visions in Daniel’s prophecy. Kingship would be conferred on “someone like a son of man.” Michael would then stand up as king and champion of his people (cf. Dan. 7:13, 14; 10:13, 21; 12:1).
The final appearance of the name Michael in the Bible
is in the book of Revelation. There he takes the lead in cleansing the heavens.
Michael and his angels would oust the Devil and his angels from heaven: “And
war broke out in heaven: Michael and his angels battled with the dragon, and
the dragon and its angels battled but it did not prevail” (Rev. 12:7, 8). Here we see Michael in
action as God’s archangel. He, along with “his angels,” defeats Satan and casts
him down to the earth (Rev. 12: 9,
10, 12; cf. 19:11-16). Not only
does he take the lead in upholding Jehovah’s sovereignty, but he is also a
destroyer of God’s enemies.
At 1 Thessalonians
4:16, the command of Jesus Christ for the resurrection to begin is
described as “the archangel’s call,” and Jude 9 identifies the archangel with Michael. Michael was
the archangel, since no other archangel is mentioned in the Bible, nor does the
Bible use “archangel” in the plural. “Archangel”
means “Chief of the angels.” Among God’s spirit servants, only two names are
associated with authority over angels: Michael and Jesus Christ (Matt. 16:27; 25:31; 2 Thes. 1:7; Rev. 19:11-21). Either their
roles overlap or it is the same person.