The LGBTI acronym stands for:
Lesbian = a woman who is emotionally and sexually attracted to women.
Gay = a man who is emotionally and sexually attracted to men.
Bi = men and women who are emotionally and sexually attracted to both men and women.
Trans (Transgender) = a person who does not feel, or only partially, they belong to the gender that was assigned to them at birth.
VSD oder Intersex = intersex people or people with a variation in sex development (VSD) are born with sex characteristics (genital, gonadal or chromosomal, phenotype) that do not fit the standard binary definitions of male or female bodies.
LGBTI hence stands for people who differ from the majority of the population in their sexual orientation, gender identity or their physical sex characteristics.
The acronym is helpful in Diversity & Inclusion Management to name the dimension but must not lead to stereotypical attributions towards these employees.