Not that I'm a native German speaker myself, but:

"Wie geht es Ihnen" literally means "How is it going for you?", which is usually translated as "How are you?". The you is in the dative ("for" you). It is important to write "Ihnen" with a capital "I", as lowercase ihnen means "them" instead. (Note that "Ihnen" and "ihnen' are just the dative-inflected versions of "Sie" and "sie".)

In colloquial speech "geht es" is often shortened to "geht's", similar to English "How's it going?".

Also, alle should not be capitalized, as it functions as a plural nominative* pronoun, and not a noun.

(*Technically it is the vocative, but German doesn't differentiate between the vocative and the nominative, like English. Again, like English, you generally use a pause [indicated by a comma] to denote the vocative.)

Heil Grammatik, mein Kamerad!