L2TP (Layer 2 Tunneling Protocol), 572
LAN (local area network), diagramming, 115
LAN Manager MIB II, 594
LAN-based technologies, 40
larger messages, holding until set times, 285
Layer 2 Tunneling Protocol (L2TP), 572
LDAP (Lightweight Directory Access Protocol), 74, 464–67
changing the number of entries per page, 363
default port, 84
native access protocol for directory information, 86
operating over a connection-oriented transport, 466
paths for domain controller naming partitions, 81
server providing information about itself, 465
SRS running to communicate with Active Directory, 352
LDAP service, port 389 locked by, 359
LDAP version 3, 465, 466
LDAP-based information, accessed by Outlook Express, 379
LDAPDN, 465
LdapKeepAliveSecs registry key, 418
LDAPMessage, 466
leaf objects, 165
legacy messaging systems, 124, 471
legal exposure to unwanted e-mail content, 510
levels of diagnostics logging, 582
liability for information security matters, 501
licensing, 155
Lightweight Directory Access Protocol. See LDAP (Lightweight Directory Access Protocol)
Limit Number Of Connections To check box, 438
Limited Access Multiple Window User mode, 163
Limited Access Single Window User mode, 163
limits
configuring for a public folder store, 226
configuring for a single public folder, 227
defining for replication for a public folder store, 230
Limits tab
folder property sheet, 227
mailbox store policy property sheet, 273
new mailbox store property sheet, 251
Public Folder Store object property sheet, 225
public folder store policy property sheet, 272
linear topology, 62
linear trust network of CAs, 564
link monitors, 588
link state algorithm, 64, 279
link state information, 64–71
commands supporting, 430
exchange of, 63
immediate transmission of, 68
managing, 293–97
not changed to DOWN, 70
oscillating, 70
performing a trace for, 65
replicating from RGM to RGM, 64
tracking, 345
link state propagation traffic, reducing unnecessary, 70
link state protocol, 63
administering, 294–97
multiple link failures and, 69–70
single-link failures and, 66–68
links
checking the status of, 68
failure of multiple, 69–70
failure of single, 66–68
high-speed forming sites, 82
between routing groups, 274
states of, 64
LIST IMAP4 command, 455
LIST NNTP command, 460
LIST POP3 command, 454
list server, 457
list services, subscribing public folders to, 215
load balancing, 281, 413
local certificate store, 567–70
local delivery queue, 56
local logons, 525
local procedure calls (LPCs), 173
Local Queue Length counter, 639
Local Retry Queue Length counter, 639
lockbox, generated by Outlook, 562
log entries, writing to the database, 37
log file maintenance settings, 268
Log File Prefix field, 245
log files
configuring, 144
default storage locations of major, 651
deleting, 37
dumping the header information of, 34
formats available for, 437
for NNTP service, 459
opening during backup mode, 604
replaying during recovery, 35
sections of, 34
specifying for the installation of Outlook 2003, 387
unique signature for, 598
log on locally policy setting, 526
Log Size area of the General tab, 580
logging, write-ahead, 31
logical bidirectional link, between two routing groups, 280
logical nature of administrative groups, 257
logical structure of Active Directory, 74–79
logical undo, 35
logical volumes, monitoring, 634
LogicalDisk counters, activating, 635
LogicalDisk object, 634
LOGIN IMAP4 command, 455
logon authentication, 406
logon banner, 504
logon page for OWA, 406
logon policies, 504
logon/logoff improvements of OWA, 406–8
LOGOUT IMAP4 command, 455
logout process for OWA, 641
logs. See also event logs
checking, 239
replaying, 35
loss of data, guarding against, 520
Lost And Found folder, 617
Lotus Notes, 153, 316
Lotus Notes Connector, 65, 153, 472
lower-level folders, 130, 212
LPCs (local procedure calls), 173
LST, compared to the GWART, 345
LSUB IMAP4 command, 455