{"id":12648,"date":"2015-05-06T10:00:00","date_gmt":"2015-05-06T08:00:00","guid":{"rendered":"http:\/\/nolabnoparty.com\/?p=12648"},"modified":"2015-05-05T08:24:19","modified_gmt":"2015-05-05T06:24:19","slug":"migrate-active-directory-to-windows-2012-r2-pt-3","status":"publish","type":"post","link":"https:\/\/nolabnoparty.com\/en\/migrate-active-directory-to-windows-2012-r2-pt-3\/","title":{"rendered":"Migrate Active Directory to Windows 2012 R2 - pt. 3"},"content":{"rendered":"

\"upgradeadto2012versionpt3_01\"<\/p>\n

Final steps to migrate Active Directory to Windows 2012 R2 include the decommission of the first 2008 R2 DC migrating the DHCP to the new Windows Server 2012 R2 .<\/p>\n

If the old Domain Controller is acting also as DHCP server, the DHCP role should be migrated to the new server 2012 R2 in order to keep same settings.<\/p>\n

<\/p>\n

 <\/p>\n

Blog series<\/h2>\n

Migrate Active Directory to Windows 2012 R2 - pt. 1<\/a>
\nMigrate Active Directory to Windows 2012 R2 - pt. 2<\/a>
\nMigrate Active Directory to Windows 2012 R2 - pt. 3<\/p>\n

 <\/p>\n

Export DHCP settings<\/h2>\n

If your primary old Domain Controller has the DHCP role installed, before the decommission we need to migrate the DHCP configuration<\/strong> to the new 2012 R2 server.<\/p>\n

Login to the Windows Server 2012 R2 previously deployed (DC01) and open the PowerShell<\/strong> shell.<\/p>\n

\"upgradeadto2012versionpt3_02\"<\/p>\n

Run the following command to export DHCP settings<\/strong>:<\/p>\n

Export-DhcpServer \u2013ComputerName server.domain.com -Leases -File path\\dhcpconfig.xml -verbose<\/p><\/blockquote>\n

PS C:\\> Export-DhcpServer \u2013ComputerName w2k8r2-dc01.nolabnoparty.local -Leases -File C:\\temp\\dhcpconfig.xml -verbose<\/span><\/p>\n

\"upgradeadto2012versionpt3_03\"<\/p>\n

Exit the PowerShell. The exported dhcpconfig.xml<\/strong> file contains the configuration of current DHCP server.<\/p>\n

\"upgradeadto2012versionpt3_04\"<\/p>\n

 <\/p>\n

Decommission last 2008 R2 Domain Controller<\/h2>\n

To decommission the last 2008 R2 Domain Controller, we have to follow the same procedure<\/strong> used in part 1 -\u00a0Decommission secondary Windows 2008 R2 DC<\/a>.<\/p>\n

From the Windows 2008 R2 Domain Controller run the dcpromo<\/strong> command and follow the steps to demote the server.<\/p>\n

\"upgradeadto2012versionpt3_05\"<\/p>\n

Deploy a new 2012 R2 server<\/strong> and promote it as Domain Controller following the same procedure used in part 2 - Deploy the first Windows 2012 R2 DC<\/a>.<\/p>\n

DON'T check the Delete the domain because this server is the last domain controller in the domain<\/strong> option and click Next\u00a0<\/strong>to proceed.<\/p>\n

\"upgradeadto2012versionpt3_06\"<\/p>\n

Click Yes<\/strong> to continue.<\/p>\n

\"upgradeadto2012versionpt3_07\"<\/p>\n

Type a Password<\/strong> then click Next<\/strong>.<\/p>\n

\"upgradeadto2012versionpt3_08\"<\/p>\n

Click Next<\/strong> to start demoting the Windows 2008 R2 Domain Controller.<\/p>\n

\"upgradeadto2012versionpt3_09\"<\/p>\n

The demoting process takes place. The server reboots automatically.<\/p>\n

\"upgradeadto2012versionpt3_10\"<\/p>\n

When the server has rebooted, remove demoted DC from the domain.<\/p>\n

\"upgradeadto2012versionpt3_11\"<\/p>\n

Check the computer has been disabled in Active Directory.<\/p>\n

\"upgradeadto2012versionpt3_12\"<\/p>\n

This server won't be used anymore, shutdown the VM.<\/p>\n

\"upgradeadto2012versionpt3_13\"<\/p>\n

If you want to keep same IP address<\/strong>\u00a0of old Domain Controller, change the IP in the new Windows 2012 R2 Domain Controller. When done, reboot the VM<\/strong>.<\/p>\n

\"upgradeadto2012versionpt3_14\"<\/p>\n

When the server has restarted, from Server Manager<\/strong> select Tools > Active Directory Users and Computers<\/strong>. Expand the domain name and select Domain Controllers<\/strong>. In the right pane the new Domain Controller shows up.<\/p>\n

\"upgradeadto2012versionpt3_15\"<\/p>\n

To verify the DNS functionality, from Server Manager<\/strong> select Tools > DNS<\/strong>. Expand the server name<\/strong> and Forward Lookup Zones<\/strong>. Right click the domain name and select Properties<\/strong>. Ensure DC is listed in the Name Servers<\/strong> tab.<\/p>\n

\"upgradeadto2012versionpt3_16\"<\/p>\n

 <\/p>\n

Import DHCP settings<\/h2>\n

If your primary Domain Controller has the DHCP role installed, we need to restore the DHCP configuration<\/strong> previously exported from the old 2008 R2 server to keep leases consistency.<\/p>\n

Login to the Windows 2012 R2 (DC01) and open the PowerShell<\/strong> shell.<\/p>\n

\"upgradeadto2012versionpt3_17\"<\/p>\n

Run the following command to import DHCP settings<\/strong>:<\/p>\n

Import-DhcpServer \u2013ComputerName server.domain.com -Leases -File path\\dhcpconfig.xml -BackupPath C:\\temp\\dhcp_backup\\ -verbose<\/p><\/blockquote>\n

PS C:\\><\/span>Import-DhcpServer -ComputerName w12r2-dc01.nolabnoparty.local -Leases -File C:\\temp\\dhcpconfig.xml -BackupPath C:\\temp\\dhcp_backup\\ -verbose<\/span><\/p>\n

Type Y<\/strong> to proceed with import.<\/p>\n

\"upgradeadto2012versionpt3_18\"<\/p>\n

The configuration is imported.<\/p>\n

\"upgradeadto2012versionpt3_19\"<\/p>\n

Open the DHCP snap-in, right click the server name and select Authorize<\/strong> option.<\/p>\n

\"upgradeadto2012versionpt3_20\"<\/p>\n

The imported scope is now active<\/strong>\u00a0on the new 2012 R2 server.<\/p>\n

\"upgradeadto2012versionpt3_21\"<\/p>\n

The migration procedure is complete. Check the Active Directory health status<\/strong> running same script used at the beginning of the migration to be sure no issues are detected.<\/p>\n

 <\/p>\n

Troubleshooting<\/h2>\n

A common issue faced during the migration is the missing SYSVOL and NETLOGON <\/strong>shares in the new 2012 R2 DCs after their promotion.<\/p>\n

Check the shares availability using the command:<\/p>\n

C:\\>net share<\/span><\/p>\n

\"upgradeadto2012versionpt3_22\"<\/p>\n

To fix this problem is necessary to force an authoritative and non-authoritative synchronization<\/strong> for replicated SYSVOL. Several\u00a0procedures\u00a0are available in Internet to guide you through the synchronization process.<\/p>\n

\"upgradeadto2012versionpt3_23\"<\/p>\n

When the shares are available again, the migration can be considered completed.<\/p>\n

\"firma\"<\/p>\n","protected":false},"excerpt":{"rendered":"

Final steps to migrate Active Directory to Windows 2012 R2 include the decommission of the first 2008 R2 DC migrating the DHCP to the new Windows Server 2012 R2 . If the old Domain Controller is acting also as DHCP server, the DHCP role should be migrated to the new server 2012 R2 in order to keep same settings.<\/p>\n","protected":false},"author":3,"featured_media":12625,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":{"linkedin_93tdZWzMZc_93tdZWzMZc":"","facebook_2879994398731222_17841400390232720":"","twitter_113568041_113568041":"","mastodon_115463926174894442_115463926174894442":""},"rop_publish_now_history":[],"rop_publish_now_status":"pending","footnotes":""},"categories":[913,1065],"tags":[1558,1593,220,1557],"class_list":["post-12648","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-active-directory-en","category-microsoft-en","tag-2012-r2","tag-active-directory","tag-domain-controller","tag-migrate","has_thumb"],"_links":{"self":[{"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/posts\/12648","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/comments?post=12648"}],"version-history":[{"count":0,"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/posts\/12648\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/media\/12625"}],"wp:attachment":[{"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/media?parent=12648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/categories?post=12648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nolabnoparty.com\/en\/wp-json\/wp\/v2\/tags?post=12648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}