Sorry for not question.
Microsoft announced about discontinuation of EXO basic authentication.
According to this, there is a limitation for using “Send Exchange mail Message”.
If you use authentication type “UserNameAndPassword”, the connection doesn’t reach to Exchange server with the 401 error.
I have no solution but there is a workaround, just replace “Send Exchange mail message” to “Send outlook mail message”( Of course some settings and operations will be changed with replacement)
This is just information for all.
If there is a post type much more than this topic, please move or repost.
Thank you.