It strikes me as unfortunate that in English the word "you" stands both for a single person and a group of people. This is different than other languages I have had contact with so far --- there, you have a "singular you" and a "plural you", which are quite different.
Usually this is not a problem, since the cardinality can be inferred from the context. However, sometimes it would be nice to explicitly state that you are referring to the whole group. Is there a generic way to do it?
If not, then for a particular example, consider a situation when out of politeness one wants to ask a pair of people some causal question, like "How do you like the weather?" or "How was your journey?" or something in that spirit. Suppose such question is included in an email or a text message sent to one of them. There may be, depending on precise situation, some ambiguity as to who the question is directed to - just the recipient, or both of them. How does one remove this ambiguity in a simple way?