Authcachettl Option
From MsgServerDocWiki
The Messaging Server can cache the results of successful LDAP authentication (e.g., when logging into IMAP, POP or SMTP or when the MMP has preauth enabled). Authcachettl defines the length of time that authentication cache entries are preserved in seconds. Lower values will reduce performance, but result in faster recognition of server password changes. Higher values will increase performance, but result in delayed recognition of server password changes. Changes made to a userPassword entry in LDAP are not seen until the entry's time-to-live (TTL) has expired. If you wish to have password changes seen at least every 15 minutes, then set this value to 900.
The default value is: 900
Use with base
The length of time in seconds an authentication cache entry will remain valid. Set to 0 to disable authentication caching.
The default value in this context is: 900
