Using the phrase “I will keep you posted” is generally considered polite and professional. However, if you are looking for a more formal alternative, you can consider using phrases such as “I will keep you apprised” or “I will keep you informed”. These alternatives convey the same meaning but may sound slightly more formal and professional in certain contexts. It is important to choose the appropriate level of formality based on the nature of the communication and the relationship with the recipient.
Will keep you posted polite?
Answered by James Kissner