To what extent is it acceptable to use informal address 'you' in professional communication?

The use of informal address with "you" in professional communication depends on corporate culture, context, and the relationships between participants. In some companies and teams, especially in IT and startups, it is common to address each other with "you" to create a more friendly and open atmosphere. In other organizations, especially with a more formal structure, it is preferable to use "you" in the formal sense to maintain professionalism and respect.

Recommendations:

• If you are unsure, it is better to start with "you" and switch to "you" (informal) only after the interlocutor agrees.
• Internal team communications often allow for "you," especially if it is accepted in the company.
• In official correspondence, with clients or management, it is better to use the formal "you".

Thus, the permissibility depends on the context, and it is important to consider the company's culture and colleagues' preferences.