On access scanning, 338–39
On-line spare memory, 195
OpenVMS, 244
Operations and Technology Group (OTG), 173
Operators
as downtime cause, 45
failures, 111
Organization, this book, 23–25
Outlook Mobile Access (OMA), 321
Outlook Web Access (OWA), 2–3
attachment blocking, 320
clients, 19
forms-based logon/cookie authentication, 319–20
front-end server, 321–22, 324
improvements, 4
junk mail beacon blocking, 320
security enhancements, 319–21
server policy, 323
S/MIME support, 320–21