The non-sentence in the title of this posting -- "Please advise if any concerns "-- is not correct English.
Both of your sentences are correct – with "advise" as an intransitive verb – in business English. In most circumstances, not in a business kind of English, "advise" would appear in those sentences with an object, in this way:
Please advise us if you have any concerns. Please advise us of any concerns regarding... _______
"Advise" can appear in these constructions:
"advise" + a noun + "to (infinitive) I advised him to get up early.
"advise" + a noun + a question word I advised him when to get up.
"advise" + a noun + on / about I advised him on / about what time to get up
"advise" + a noun + of I advised him of the necessity to get up early.
"Advise" can also be followed by an "if" clause, as in your sentence, or a "that" clause.
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