Thanks for the great explanation.
( if its released yet). Also I have 2 domains, so I have to do a
domainprep for each domain.
exchange 2003 to exchange 2007. As I know there are schema updates required
there.
Post by Meinolf Weber [MVP-DS]Hello guv,
You have to upgrade the schema on the schema master with an account
of the schema admins. 2008 will be schme aversion 44 and 2008 R2
needs also a schema upgrade to version 47. You can check with
"schupgr" in a command line the version.
As long as you not raise the functional levels to Windows server
2008/Windows server 2008 R2 you wan't have additional options for
DCs, but you have additional functionalities like group policy
preferences also with having 2008 member servers.
Fine grained password policies for example requires all DCs to be
2008 and functional levels as Windows server 2008.
Active directory recycle bin for example requires Windows server 2008 R2.
You should install additioanl DCs instead of using in-place upgrade
in my opinion. It is always better to use a fresh install with clean
OS version.
http://technet.microsoft.com/en-us/library/cc731728(WS.10).aspx
http://technet.microsoft.com/en-us/library/cc771132(WS.10).aspx
!!!NEVER START BEFORE HAVING CREATED AND TESTED A BACKUP OF YOUR DATA/MACHINE!!!
- On the old server open DNS management console and check that you
are running Active directory integrated zone (easier for replication,
if you have more then one DNS server)
- run replmon from the run line or repadmin /showrepl(only if more
then one DC exist), dcdiag and netdiag from the command prompt on the
old machine to check for errors, if you have some post the complete
output from the command here or solve them first. For this tools you
have to install the support\tools\suptools.msi from the 2003
installation disk.
- run adprep /forestprep and adprep /domainprep and adprep /rodcprep
from the 2008 installation disk against the 2003 schema master, with
an account that is member of the Schema admins, to upgrade the schema
to the new version (44), you can check the version with "schupgr" in
a command prompt.
- Install the new machine as a member server in your existing domain
- configure a fixed ip and set the preferred DNS server to the old
DNS server only
- run dcpromo and follow the wizard to add the 2008 server to an
existing domain, make it also Global catalog and DNS server.
- for DNS give the server time for replication, at least 15 minutes.
Because you use Active directory integrated zones it will
automatically replicate the zones to the new server. Open DNS
management console to check that they appear
- if the new machine is domain controller and DNS server run again
replmon, dcdiag and netdiag (copy the netdiag from the 2003 to 2008,
will work) on both domain controllers
- Transfer, NOT seize the 5 FSMO roles to the new Domain controller
(http://support.microsoft.com/kb/324801 applies also for 2008), FSMO
should always be on the newest OS DC
- you can see in the event viewer (Directory service) that the roles
are transferred, also give it some time
- reconfigure the DNS configuration on your NIC of the 2008 server,
preferred DNS itself, secondary the old one
- if you use DHCP do not forget to reconfigure the scope settings to
point to the new installed DNS server
- export and import of DHCP database for 2008 choose "netshell dhcp
backup" and "netshell dhcp restore" command
(http://technet.microsoft.com/en-us/library/cc772372.aspx)
Demoting the old DC
- reconfigure your clients/servers that they not longer point to the
old DC/DNS server on the NIC
- to be sure that everything runs fine, disconnect the old DC from
the network and check with clients and servers the connectivity,
logon and also with one client a restart to see that everything is ok
- then run dcpromo to demote the old DC, if it works fine the machine
will move from the DC's OU to the computers container, where you can
delete it by hand. Can be that you got an error during demoting at
the beginning, then uncheck the Global catalog on that DC and try
again
- check the DNS management console, that all entries from the machine
are disappeared or delete them by hand if the machine is off the
network for ever
- also you have to start AD sites and services and delete the old
servername under the site, this will not be done during demotion
Best regards
Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and
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Post by unknownWe are running a naive windows 2003 domain, and now want to upgrade to
windows 2008. We have one forest with 2 domains and have several sites and
each site has several domain controllers. My question is how do we upgrade
to windows 2008 domain. Is there any schema update we do , if so
what
is
the procedure.
Also what functional levels are there in windows 2008 and what features we
would get with w2008 DC's running in a windows 2003 domain.
Also are there any known issues with upgrading from w2003 to w2008, or
with doing any schema updates.
Thanks