I believe there are two spots to change your maximum message length / recording time. They probably both have to be set to 3600 seconds.One is in the COS, titled Message Maximum Length, it is in seconds.The second is in the Advanced | Telephony page...

For UC there is no active languages list like there is in Unity. At least, not one that I know of.The more specific reason you are being offered to record either US or UK English prompts is because in your User's Message Settings page they have "Lan...