What is the Best way to Communicate other Company Employees?

The best way to communicate by  warm "Hello " with a pleasant smile, if you have a visiting card exchange it , then introduce your self and then introduce your company.

Then give a chance to introduce other person and get information on his/her company.

If you are not meeting face to face best way is through a email (Introduction of self and company)

or putting a request in Linkedin for adding and follow his/her  interest analyse you have common interest in work , browse through groups which are common)

well presentation well inroduce you

try to make your1st impression is the best at all