On the Help page about making friends, under the “How do I ask someone to be my friend?” question, at the 2nd instruction, there’s a note that says While not required, it is recommended that you send a polite message to the other player notifying them of your request as that person may not know or remember who you are. This is incorrect because you can’t send people messages in Roblox anymore as the Inbox feature was removed.
It is currently impossible to message users you don’t know in Roblox. At the moment users can message each other only in-game or 3rd Party apps because the only messaging feature that Roblox has on the website is only available between friends.
The page seems to be updated for the increased 1,000 friends update, but not for the removal of player to player message.
While this issue is not a big deal, it could get quite confusing for some users about how to message other users.
Page URL: https://en.help.roblox.com/hc/en-us/articles/203313580-How-to-Make-Friends