I like #99 - the pictogram suggests a group or a meetins as you described - Can i see a verision in blue and green please? Also, another with Business above the IT Group?
Another thought... #99 can we put anything inside the cirlce or would it look too busy? For example is there a way to illustrate a business being surrounded/protected/covered by a company that provides IT support?
Here are my updated logos based on your request. I immagined here that the seats is your group and the circle in the middle is the business of your client. =)
if you will notice I used different sizes on the Fonts, Different green and blue Hues. Just tell which color, font size you want and we can mixe and match everything. I will submit my new version on your latest request asap.