When Password Policy app is enabled and the password does not meet the configured password settings, conversation cannot be created.

STR:

1. Enable Password Policy app.
2. Go to Administration Settings > Security.
3. In the Password Policy section - configure some options like set minimum password length, enforce lower and upper cases.
4. In the talk android, create a new conversation, allow guests and create a password and you should see some suggestions for setting the password like password should contain min. 10 letters ....... based on the configuration set.