Migrate Server 2008 R2 to Server 2012 R2

There are two ways to do it you can directly upgrade server 2008 to server 2012 which is not recommended or you can transfer all FSMO roles from 2008 r2 to 2012 r2 which we are discussing in this post steps for migrating server 2008 to server 2012 is given below,

First we have to prepare server 2008 r2 for server 2012 r2  insert Server 2012 R2 DVD into Server 2008 R2 go to command prompt run command adprep /forestprep

Type c then hit enter to continue at this process you see your current schema version is 47 and it is updating to 69 after it complete run command adprep /domainprep

After adprep successfully update the domain wide information go to server2012 for creating additional domain controller to doing this open server manger and click on add role

Click next at first screen

installation type click next

Server selection click next

On server role screen select active directory domain services click on add features then click next

Click next

Click next

Click on install then click on close

Click on flag then click on Promote this server to a domain controller

Select add a domain controller to an existing domain select domain click next

Confirm that both DNS and GC option are checked then type DSRM password click next

Click next

Select FQDN name in replicate from then click next

Click next

Click next then click on install

Our additional DC is created now it’s time to transfer FSMO roles from 2008 to 2012 which is most important part of migrate server 2008 r2 to server 2012 r2

go to active directory check on domain controller you can see your both server names

Run command netdom query fsmo you see all roles are on DC.thetechnosolution.com now we are going to transfer these roles to server2012

Go to run type regsvr32 schmmgmt.dll hit enter

Go to run type mmc hit enter mmc window open go to file click on add or remove snap in select active directory schema click add then click ok

Right click on active directory shema then click on change domain controller select server 2012.thetechnosolution.com then click ok

Right click on active directory schema click on operation master, click on change to change schema role click yes on confirmation message

Schema masters are change from DC.thetechnosolution.com to Server2012.thetechnosolution.com click ok

Then go to active directory domains and trusts right click then select connect to domain contrellorer then select server2012.thetechnosolution.com

Change operation masters from dc.thetechnosolution.com to server2012.thetechnosolution.com

Then go to active directory users and computers connect with server2012.thetechnosolution.com

Right click on opration masters then change all three RID, PDC and Infrastructure masters

Re-run command netdom query fsmo you can see all roles are on now server2012.thetechnosolution.com

Now delegate server 2008 by running dcpromo, migrate server 2008 r2 to server 2012 r2 is complete