I need a help with regard to achiever "Valid or Invalid" result
Filers GIIN field is a combination of "Alpha + Numeric + Special character" like the one shown below and it should be (19 character length)
1CSJ3C.99999.SL.136
I wanted to write a formula where if there is any change in this format then should result as "Invalid" Else "Valid". IMP NOTE: This format is case sensitive
I tried "Length" formula, but do not meet the purpose of this specific format
