In this phase, ongoing messages accounts and messages are migrated from the in existence messaging environment to the Microsoft Exchange 2003 environment. Your movement strategy must be dead in a posture that is diaphanous and that has the least thinkable impinging on your modern e-mail users.
To effectuate these goals, an effectual movement scheme and called for colonization tools must be planned and enforced. They essential computer address all aspects of policy migration, together with networking, peripheral interfaces, rationalization synchronization, admin systems, and nonintersecting transaction.
This chapter contains the next sections:
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Developing a Migration Strategy
Preparing the Migration Plan
Using Migration Utilities
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Tips for a Successful Migration
Refer to the Microsoft Exchange 2003 Migration Guide for rank hearsay on move.
Developing a Migration Strategy
The characteristic site where Microsoft Exchange 2003 is installed has an current letters group that provides electronic messaging work to its users. Migration is the act of fast-flying or stealing the data for all users from the bequest (existing) complex to the Microsoft Exchange 2003 association. Migration is performed so that all regulars can be serviceable by the Microsoft Exchange 2003 system, not simply those new subscribers pursuing the inauguration of Microsoft Exchange 2003.
Migration is the most analyzable feature of any deployment overhang. Even nevertheless this written material provides a hypothesis to travel for migration, no two migrations are in particular alike, due to the differences in all site's bequest e-mail system and its united systems and procedures. A glorious move depends upon accurately identifying all peerless aspects of the arrangement that are to be duplicated in Microsoft Exchange and afterwards duplicating these requisites done evolution and trialling prior to the effective corporal migration.
The important issues of interest in any motion to a new mail service are information wholeness and clear cutover to manufacture. Data wholeness guarantees that all correspondence accounts, hold on messages, and related private data and preferences (for example, address books, passwords, and so off) are accurately maintained in the new letters policy. Transparent cutover to industry technique that the change of state is handled quickly, cleanly, and near no delay to the end-user feel.
In emblematic migrations, the sum magnitude of instance necessary for a self-made transition is a mathematical relation of grouping complexity. Both the absolute numeral of e-mail accounts and the inclusive figure of hold on messages are key factors. In addition, move instance can be artificial by arrangement and site-specific issues.
Any migration plan of action essential address:
Migrating accounts
Migrating mailboxes
Migrating Accounts
This migration involves all of the news that unambiguously identifies and describes a user, together with class-of-service information that defines the resource for which users are signed. Account facts must be located in the Microsoft Exchange 2003 arrangement previously message information. The most basic undertaking is hence to assemble and transportation explanation background from the bequest policy and after transfer it to the Microsoft Exchange 2003 group.
If your inheritance set of connections has domains and organizational units, you must gear up to move these too.
Migrating Mailboxes
This motion involves communication data-the very messages to be migrated that be to the soul. The mailbox is just a assemblage of the messages belonging to a special portrayal.
Preparing the Migration Plan
Migration involves celebrated planning, more than so than any opposite deployment task. This planning is requisite because the buzz is exposed to extant users and will, in utmost cases, be the introductory submit yourself to that users have of the new set-up. It is very major to approach for all contingence in establish to thwart teething troubles during the migration.
Refer to Appendix A for statistics on how to make a purchase of a token movement invent.
Migration is 95 pct readying and 5 proportion corporal punishment. A host of factors that essential be well thought out in order for a move to take the place of.
The Migration Plan provides a detailed, gradual practice for migrating accounts and mailboxes to Microsoft Exchange 2003. The readying squad should spawn various dry runs of this plan, with all dry run consequential in a sequent culture of the line of attack.
Any move think up should address these considerations:
Ensuring systems readiness
Coordinating near other groups and characteristic dependencies
Verifying software inauguration and configuration
Setting up the audition system
Providing provisioning connectivity
Testing the migration
Choosing untasted or controlled migration
Resuming service
Ensuring Systems Readiness
All systems to be well-tried must be in place and effective in the past testing begins. In adding up networks must be implemented as definite in the edifice logo (see Chapter 2).
For all artistic electronic mail system, different IP settings (each near creative "A" files in the DNS) essential be legitimate for the following:
Host Address This is the unalterable IP undertaking for the grownup.
Service Address This is the computer address that is used by all e-mail clients for a work. The Service Address will be re-assigned to Microsoft Exchange at the instance of business relationship migration.
Service Proxy Address There essential be a Service Proxy Address for all Service Address. The IP numeral used for any Service Proxy Address will clash its various Service Address. The Service Proxy Address will be utilized for agent targeting wherever procurator is used on the Microsoft Exchange net. These can be de-assigned after all migrations are all and once it is pushy that a revert regulation is not requisite.
Coordinating with Other Groups and Identifying Dependencies
Since any motion touches upon lots aspects of a company's operations, brand assured you equal the movement beside all unnatural groups and identify dependencies-that is, crucial the instruct in which systems should be migrated.
Verifying Software Installation and Configuration
In increment to instalment Microsoft Exchange 2003 (see Chapter 3) and validatory that all components inter-operate, you must set correct Microsoft Exchange environment settings for the core soul. These involve the correct $PATH, $LD_LIBARARY_PATH, and $Microsoft Exchange settings in bidding to access the Microsoft Exchange colonization tools.
Setting Up the Test System
To formalise a movement plan, the mental test scheme should have the dimensions of amount produced systems, as well as the appropriate retention manuscript plan and failover configuration (service cohesiveness). The question paper group must have Internet connectivity, as Proxy style dealing cannot be proven lacking this.
Aside from instrumentation that mimics the amount produced system, psychometric test manipulator machines essential too be unspoken for to pressure the move and capableness tests. The assessment drivers must be designed next to migration utilities as cured as near communication clients or other than trial utilities for accessing and causation letters.
At least one test adult is sought after for colonization testing; this grownup acts as a foster for the actual online e-mail hosts and holds all mailbox background obligatory for testing.
Providing Provisioning Connectivity
The provisioning interface essential be valid back motion can go on. C API procedures should be proven to guarantee that modifications performed on the ISD are successful and are propagated to the provisioning info. The Perl API set for delivery explanation migration besides essential be proved. Last, body routines in the provisioning policy or ISD must be valid.
This conducting tests is performed in a double provisioning state of affairs. The utility of double provisioning is to secure the knack to turn back to the inheritance letters grouping in the circumstance that the new communication association in not victorious.
For provisioning, computerized mailbox activity must be tried. Zero-length mailboxes are routinely not migrated; rather, they are inverted on in Microsoft Exchange 2003. The prototypical instance e-mail is received or checked, the letter box can be created. A bulky mental testing database (representing the paperback of awaited accounts) must be test-migrated to assure that the code of behaviour plant and that the end ISD database can grip it.
If possible, you should set a range of "friendly" users volitional to aid in identifying any problems or errors
Testing the Migration
Before the colonization can occur, wide conducting tests on the productivity arrangement essential be completed. Migration audition endeavours are "non-intrusive" to the current correspondence policy and are conducted from a apart arrangement victimisation actual human tale gossip and a test reproduction of the production someone aggregation.
The procedures for extracting sketch information from the legacy set of contacts essential be tested. The skill and utilities to consignment these accounts into the ISD essential be valid finished testing. Each background of pay must be included, as fine as all union of picture attributes, specified as forwarding, aliases, and break replies.
In addition, the procedure of awheel mailboxes to the Microsoft Exchange 2003 system essential be tried. This manoeuvre includes the means of suspending the account, the sensual transferral of messages and attachments, and the official document of the account to influential position.
You should bring in any likely structure changes to stop system or grouping loading. In addition, you essential launch any notable network, host, or retention accommodations that may be needful for conducting tests. A peculiar make friends plan may be requisite to hinder assemblage complications introduced by movement testing. Another therapy may involve locating of the ingenious letter box retention to the Microsoft Exchange 2003 regulations.
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Note: Depending on the fine points of a fixed migration, you may inevitability to discover new scripts or make specially alive movement scripts. All scripts for managing batch processes must be realized and proven prior to movement.
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Choosing Full or Limited Migration
Accounts to migrate can be defined supported on concern rules (for example, all letters accounts in fitting status or preference accounts requiring hasty access to features not offered in the exiting letters convention).
If you are not active to transmigrate the full population at one time, at hand are lasting considerations you obligation to think up for. For fixed migration, you essential piece the Microsoft Exchange 2003 convention for POP procurator in bidding to regain correspondence from the birthright set of laws for unmigrated accounts and mailboxes. The edifice must as well rationalization for SMTP handing over during Proxy style in dictation to present appropriate correspondence to the birthright set-up as okay as to Microsoft Exchange 2003.
The style of migrating article data essential be known and well-tried. Before the modest justification motion can occur, a back-out plan, migration choice assurance, and citations of movement must be resolute and valid by conducting tests.
In various instances, new subscribers to messages provision at the user locality are else to the Microsoft Exchange 2003 net past migrated accounts from the heritage set of laws. The benefits of handling new registrations in Microsoft Exchange 2003 are that you may be able to:
Offer differentiated service at once.
Introduce Microsoft Exchange 2003 at a measured step.
Ensure that no much users are further to an out-of-date set of laws.
Resuming Service
Once motion is completed, accounts are reflexively switched from Proxy way to active state. Users get entree to their mailboxes and all messages that were delayed during migration are delivered to their wilful recipients. In addition, you must dart transaction totally to the Microsoft Exchange 2003 rules and muster out the heritage grouping.
A burn-in time of year should be identified, over which the Microsoft Exchange 2003 complex essential be familiarly monitored for faux pas provisions.
Using Migration Utilities
There are quadruplex methods for the mutual motion of accounts and mailboxes. One recipe is to transportation all accounts in a isolated migration. Then, mailboxes can be transferred in batches. Another line is to interchange a shipment of accounts, then transportation a load of related mailboxes, and so on.
Utilities that backing the elected plan of action must consequently be formulated and proved. These tests should include timing of the corporal punishment of these utilities.
This form involves the grounds of the motion utilities themselves and must encompass the design, development, and testing of the colonization utilities that are to be used to migrate the e-mail from the extant set of contacts to the recently enforced Microsoft Exchange 2003 net. New tools have to be improved markedly repeatedly because of the contrasting root e-mail systems that can be in being.
Microsoft Exchange 2003 offers automatic motion tools planned to streamline the procedure of exciting your service, plus integral tools for work mistreatment Sendmail and Software.com's Post.Office. These flexible, modular, and customizable tools are Perl scripts that handgrip the goods of directory, mailbox, and user figures from these opposite systems to files in Microsoft Exchange 2003-readable info (based on LDIF), which are then foreign into Microsoft Exchange 2003. These tools change you to transmigrate all accounts at former or as incremental blocks of users. When migrating from a diverse messages system such as as Netscape Messaging Server or SIMS, Microsoft Exchange 2003's agent features and square-built trade goods bid set make available a jelled underpinning for fast stirring of convention goods scripts.
Tips for a Successful Migration
With the achievement of the movement tests, the sole awaited impinging will be caused by the difference in practicality concerning post systems. Once the colonization of accounts has started, the mark harvest situation becomes the amount produced situation.
The motion set of rules involves these separate steps:
Setting up Microsoft Exchange 2003 in Proxy mode
Changing the MX record
Identifying accounts to be migrated
Extracting commentary information
Creating accounts in Microsoft Exchange 2003
Migrating messages
Setting Up Microsoft Exchange 2003 in Proxy Mode
Microsoft Exchange essential be organized for Proxy manner antecedent to actuating the set of connections. The placeholder pattern permits the passage of communication and feature requests to the gift group until the filled migration has been achieved.
In Proxy mode, all arriving messages is orientated to Microsoft Exchange 2003. If the e-mail is for a person that does not have an Microsoft Exchange account, the communication is relayed to the legacy scheme for transfer. If a person attempts to retrieve mail, but the user's box is not yet settled on the Microsoft Exchange 2003 system, the POP restaurant attendant will link to the heritage set-up and will get the e-mail from the gift letter box situation.
Changing the MX Record
In lay down for post to reach the Microsoft Exchange 2003 set of laws (instead of the inheritance system), you must natural event the MX register in the DNS for the correspondence arena of the site, so that aggregation is directed to Microsoft Exchange 2003.
With all of the mail orientated to Microsoft Exchange, you can get going to burn-in the set of laws with unrecorded large indefinite quantity and get accustomed to dealing control even if here is no commentary facts in the arrangement. However, as before long as the grouping is activated, accounts are provisioned direct into Microsoft Exchange 2003.
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Note: This step can issue a few hours to be propagated ended the Internet.
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Identifying Accounts to Be Migrated
The prototypal stair in migration is to learn which present communication accounts will dart to the Microsoft Exchange 2003 set of contacts. Accounts to migrate can be defined based on commercial rules (for example, all messages accounts in right standing, or priority accounts requiring beforehand right to features not offered in the extant mail system).
Extracting Account Information
After process the accounts to migrate, the side by side step is to passage portrayal numbers from the alive letters rules. Using the point of reference account list, portrayal hearsay is exported into a folder in LDAP Data Interchange Format (LDIF). The rule LDIF info permits the importation of statement substance from any extant communication complex to an Microsoft Exchange rules. The scripts previously owned here can be customized to handgrip any development.
Creating Accounts in Microsoft Exchange 2003
Next, accounts are created in the Microsoft Exchange calendar based on the portrayal info represented in the LDIF directory. As accounts are created, they are set in Proxy mode, causation e-mail delivery to and access from unmigrated accounts to be passed evenly done to the old mail system, in so doing ensuring round-the-clock provision to end users. During this phase, if a somebody wood in and supplies an inglorious username, the Microsoft Exchange POP waiter connects to the popular electronic mail policy.
Migrating Messages
The ultimate form of motion involves vibratory correspondence messages from the existent correspondence net to the Microsoft Exchange group. Message motion may happen any as disjoint files or as a single, concatenated report. However, several customization is as usual required, since the way a communication is hold on in the Message Store Server (MSS) can vary from the stock correspondence information. This form requires new accounts to run in Maintenance mode, during which circumstance these mailboxes are untouchable. For this reason, communication colonization is routinely performed in short increments during off-peak hours.
Exchange Migration design for wriggly forward:
Perform Due Diligence on your gridiron via Remote Terminal Service ( Next Week)
Identify active components - users, groups, login variables
Document proposed AD structure
Project kickoff seminar (Friday)
Install Windows Server 2003 (Friday Night)
Install Active Directory (Friday Night)
Configure, Patch and Connect (Friday Night)
Review Event Log, smooth out any errors (Friday Night)
Connect AD situation to existent Windows 2000 (Friday Night)
Identify present printers (Saturday)
Identify alive components in Exchange (Saturday)
Build Exchange, configure, marking(Saturday)
Install and set up microorganism software,Spam cure and Fax
Software(Saturday)
Configure OWA in DMZ(Saturday)
Verify Installation (Saturday)
Perform Mailbox Move (Saturday)
Install Outlook 2003 on all desktops. (Saturday - Sunday)
Review Event Log, smooth out any errors (Sunday)
Setup Test digital computer/perform trialling (Sunday)
On-Site to knob any issues near the migration (Monday)
The above stairway are one and only an calculation of manual labour required to be act a eminent movement. After we perform the Due Diligence Intercore will have a more definite plan in MS Project to full item the comprehensiveness of profession needful to perform the move . This Due Diligence will place issues that we can clear up back the motion is performed.
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