I am looking for the biblical references to Michael the angel ? And what are/were his/her role? There are some christian groups that attributes Michael same with Jesus. Is there any biblical reference to it?
Well, Jude 9 says:
From that verse, it would seem to be hard to equate Michael and Jesus.
The only other reference to "archangel" I know of is in 1 Thessalonians 4:16:
That verse seems to indicate the "voice of the archangel" will announce Christ's ( the Lord Himself) return - again listed as a separate being.
References to Michael
NOTE: the word one is a gross misinterpretation of the word echad in this situation which means first using Strong's Dictionary. One of the chief princes actually translated correctly means the First of the chief princes.
The roles of Michael of the Archangel
#1 He stands for the people of God
He stands for the people of God (an advocate) and an example of him standing for them is in Jude 1:9 below
The words translated railing is blasphēmia which Strong's Dictionary says mean blaspheme or evil speaking. Michael did not bring a blasphemous accusation but said the Lord rebuke thee. He was not afraid of satan as some would try to make us think but dared not to bring a blaphemous accusation which is sin.
Jesus the Lord is our advocate
In this scenario we have the Lord being the advocate of Joshua and saying the same thing Michael said to satan. It seems as though Jesus has the same office with Michael or maybe they are the same person.
#2 He is the captain of the Lord's Host
He leads the angels in the battle with satan thus he is the captain. His position as archangel means chief of the angels (check your Strong's dictionary)
Here we see that Michael cannot be a literal angel since he accepts worship as God. No angel coming from God accepts worship:
#3 He is the Chief Messenger
The word angel means messenger so therefore he must be the Arch Messenger. Michael is not an a literal angel but a messenger. the word messenger and the word angel are the same in both greek and hebrew.
Strong's Hebrew dictionary
messenger = malak
angel = malak
Strong's Greek Dictionary
messenger = aggellō
angel = aggellō
What about 1thess 4:16?
The event described here is the Second coming. With the parallel produced by John 5:25 and 1 thess 4:16 it is hard to think Jesus the Son of God is not Michael the Archangel shouting with the trump of God.
ALWAYS REMEMBER MICHAEL IS NOT A LITERAL ANGEL HE IS A CHIEF MESSENGER.
Other than the reference that @warren has given. The other passage believed to refer to him is in Daniel 10. Note that the word angel isn't used here - he is called a prince - but context may imply it.