I do not believe there is such feature on any ASA code as to time based local account expiration, you would have to use 3rd party like Cisco Secure Access Control Server (ACS) where you can have that feature / manage all accounts expiration dates etc..
Phillip, your post is upsolutely correct applicable to RA vpn, perhaps if original poster could specify whether he meant RA vpn client local account access expiration date or local account expiration as a whole meaning no access to asa from the inside for management as I have understood. If RA vpn your answer is correct.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...