Configuration Settings document - IMAP - Basics tab
FieldEnter
Maximum number of IMAP sessionsThe maximum number of concurrent IMAP client sessions the server allows. By default, no limit is imposed.
IMAP session timeoutThe time, in minutes, that the IMAP service continues to maintain an idle session. If there is no client activity by the end of the specified time, Domino closes the session.
Enable IMAP during loginChoose one:
  • Enabled - (default) The IMAP service automatically converts mail files to Lotus Domino Release 6 IMAP format the first time a user logs in from an IMAP client.
  • Disabled - Administrators must manually convert mail files for IMAP use before users can access mail from an IMAP client.
Note These settings apply to servers running Domino Release 6 and later. To specify IMAP session limits on a Domino R5 or earlier server, use the IMAPMaxSessions and IMAP_Session_Timeout settings in the NOTES.INI file.