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If you have a lot of users with fat inboxes, you might want to start
replication over a weekend. Because the replication is based on
transactions, no corruption of the Exchange database is passed on to the
backup. There was a wide variety of OSes and applications, including IBM
WebSphere, Oracle, simple Apache and IIS Web servers, Linux-based load
balancers, and even Active Directory domain controllers. Quest has
automated switch-over for affected users, although Outlook will have to
be restarted. But often, moving between apps means logging in to Google
over and over, and moving data between applications can be
difficult. 
Transmissions to the data store can be encrypted as well, if the store
is at an off-site location connected via WAN. This is also true of
software- and hardware-based iSCSI HBAs and FC HBAs. 
Which is least expensive will depend on how many users per server you
have. Although some admins may take issue with the absence of automated
fail-over, the product is easy to set up and administer and offers a
reasonable value. 
You can track every change to some accounts, while keeping only the
latest copy of other mailboxes, but only by spreading the accounts
across separate stores. 
Users must restart Outlook to reconnect to the backup mailboxes.
Neverfail Group offers a variety of application modules other than
Exchange, including IBM Lotus Domino, Microsoft File Server, Oracle
Database, SharePoint, and SQL Server. The iRows toolbar and menu system
had no support for creating formulas. 
Administrators can control replication by storage group, by Exchange
server, or by individual accounts. If a primary Exchange server fails,
or its database is corrupted, the designated accounts can access the
backup server instead. 
Pricing is per pair of servers, based on the server in the pair with the
greater number of CPUs. 
Dragging another persona into the diagram and linking it to the proper
vSwitches, giving it IP address information, will automatically place
that new persona in the right logical network segments. 
Both Neverfail and SteelEye provide automatic fail-over for a whole
server, and SteelEye provides additional many-to-one functionality at a
lower price. Dragging another persona into the diagram and linking it to
the proper vSwitches, giving it IP address information, will
automatically place that new persona in the right logical network
segments. 
Setting up LifeKeeper is straightforward. Adding text is a two-step
process, as well, instead of the simple click-and-type procedure in
PowerPoint. 
Two others, Cemaphore Systems MailShadow and Quest Availability Manager,
protect individual mailboxes on one or more Exchange servers. MailShadow
requires admins to initiate a manual switch-over for affected users and
requires users to restart Outlook. All of the servers should be in the
same Windows domain. Archiving can be driven by fine-grain policies, but
policy is applied on a per-store basis. You can track every change to
some accounts, while keeping only the latest copy of other mailboxes,
but only by spreading the accounts across separate stores. 
Zoho displayed a few dozen cells of one-letter gobbledygook and also
claimed success. This can be done on an individual basis or for all
users on a given Exchange server. All of the servers should be in the
same Windows domain. 
Heck, Office and SharePoint have been catching up to wikis, blogs, and
message boards for some time. 
Users will have to restart Outlook to switch to the secondary store, and
QAM provides an alert notifying them of this. It also generates a system
ID that Neverfail uses to create a license key. 
Man, nothing makes your blood pressure go up quicker than trying to do
work on the Web while on a public Wi-Fi connection that drops you more
often than a Hollywood wife. 
Zoho displayed a few dozen cells of one-letter gobbledygook and also
claimed success. Users connecting via MAPI or the Outlook Web Access
client may need to restart the client to connect to the backup server.
For instance, an Apache Web server could be built on any physical
server, configured, have an application installed, and then be condensed
into a persona. Locally installed applications are simply more reliable
and feature-rich. 
Users must restart Outlook to reconnect to the backup mailboxes. That
was no trouble because the office had guest Internet access and a steady
Wi-Fi connection. 
It involves a controller built on a Red Hat Linux base that essentially
has its way with all associated network switches and server hardware. 
 
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