I don’t even think that this is an official doctrine of the SDA Church. I’ve definitely heard it being mentioned by pastors, but I think it’s up to individual people if they want to believe one way or the other: I grew up believing that Michael is, like Gabriel, an Archangel, and thus separate from Jesus.
Then again, Gabriel is not called an Archangel in the Bible, whereas the term is applied once to Michael and another time to the voice of the Lord when He will descend from Heaven (1 Thessalonians 4:16).
Ellen White and her fellow co-founders of the Seventh-day Adventist Church believed that Christ…
…Existed eternally “in the flesh” of Father God.
…So in that sense, the Son was eternal without having a “separate deity”.
…Once creature Christ became “self aware” He was issued a conditional deity from Ultimate God.
Christ was understood to be an archangel in this SDA schema…
…He looked just like the other archangels BUT was actually exuded from God.
…This is contrasted with God making the other angels out of nothing.
Remember, the key to understanding SDAism is understanding what they mean by “Personality of God”…
…I.E. God the Father and all His angel creations were flesh laden hominids.
…Because Christ was exuded from the actual flesh of ultimate God Christ is said to be eternal.
However, in SDA theology there are countless “archangels”…
Ellen White, Seventh Day Adventist Signs of the Times Sept 14 1882
Rebellion originated with Satan. Notwithstanding the exalted position which he occupied among the heavenly host, he became dissatisfied because he was not accorded supreme honor. Hence he questioned God’s purposes and impugned his justice. He bent all his powers to allure the angels from their allegiance.
The fact that he was an archangel, glorious and powerful, enabled him to exert a mighty influence. His complaints against God’s government, at first met with no favor; yet being urged again and again, they were finally accepted by those who had before been loyal and happy subjects of the King of Heaven. There was not the shadow of justification or excuse for disaffection; but envy and jealousy, once cherished, gained a power that paralyzed reason and destroyed honor and loyalty. As the result, Satan and all his sympathizers were cast out of Heaven.
Thus, Lucifer was also an archangel.
In 1941 this was again affirmed in SDA Publications…
…Note page 2 of the following URL in the article “How Evil Began”.
docs.adventistarchives.org/docs/STAUS/STAUS19410908-V56-36__C.pdf#search=%22 was an archangel %22&view=fit
This is the Seventh-day Adventist Church official publication archive.
“The first rebellion, or sin, which is transgression of the divine law (i John 3:4), originated in a leader of the angels, one high in the administration of God’s government. It was an
archangel who, through pride in his brilliancy, fell, and so committed himself to an age-long
controversy with his Maker”
Ellen White made multiple affirmations that there were many other archangels…
…But to be fair to the SDA prophet the contrast was that those other archangels were made out of nothing.
…While creature Christ was exuded out of the Father Himself ( a flesh hominid God ).
Ellen White
God made him [Lucifer] good and beautiful, as near as possible like Himself.–RH Sept. 24,1901. {TA 26.4}
Page 1, center column.
docs.adventistarchives.org/docs/RH/RH19010924-V78-39__B.pdf#search=%22 as possible like himself %22&view=fit
Ellen White
Listen to their voices as they sing loud hosannas and as they wave the palm branches of victory. Rich music fills heaven as their voices sing forth these words: “Worthy, worthy is the Lamb that was slain and rose again forevermore. Salvation unto our God which sitteth upon the throne, and unto the Lamb.” And the angelic host, angels and
archangels, covering cherub and glorious seraph, echo back the refrain of that joyous, triumphant song saying, “Amen: Blessing, and glory, and wisdom, and thanksgiving, and honour, and power, and might, be unto our God for ever and ever” (Rev. 7:12). {Mar 329.3}
Seventh Day Adventist Bible Training School
The Son of God was rich and mighty and blessed. But when he would
win the hearts of proud, selfish, and passionate men, he did not put on his robes of
glory and surround himself with angels and
archangels and the whole company of
heaven.
There are scores more and the reason I posted the ones above isn’t because…
…I believe there is only one archangel - it’s because SDA’s are now taught as you said.
…“I.E.” There is only one and it’s Michael Christ ( aka creature Christ ).