Computer Object Description option is not updated after Migrated from Source Domain to target Domain

Please details what the process was that yielded these undesirable results.  

We have Migrate the server by using the RUM console,

Please find the below details what I processed 

1) Add the server in RUM console Collation

2) Enabled the Remote Registry

3) Processed the Discovery task

4) and the Processing task with enabled all check marks in Handling the Right and Resource option.

5) Once its done the Processing Task, then move the server

So using that process, you find that data stored in the source directory is missing in the target directory? 

You need to migrate the source computer object to the target using a migration session. If you only care about a limited number of attributes, skip the rest. 

I tried to Migrate the Computer object by using the Migration session , but its get failed , because the computer object were already created, during the server Migration by using the RUM Console.

What is the process to do follow from next onwards

1) First Migrate the computer object by using the Migration session and then proceed with server migration by using RUM console

or

2) from migration session can we migrated the server including the computer object attribute values.

If you migrate the directory object first, and move the computer, you need to not set the OU on the move task. 

If you migrate the directory object after the computer is moved, the account name matching rule must be enable. 

Thanks for the information, let me check and update you the status. Thanks once again

I never had any success migrating computer object first followed by RUM processing. During Move phase it fails as the computer object with that name already exists.
Is there a way to resolve that?

This could be due to a Msft domain security setting where computers are not allowed to re-join to pre-existing computer accounts.

My suggestion would be as follows:

1) Use RUM to move the computer to a new domain

2) Prepare a tab delimited import file containing your source and target computer account names, a name column plus your new description

3) Process the above file using a migration session in which you select one of the "merge" options

This could be due to a Msft domain security setting where computers are not allowed to re-join to pre-existing computer accounts.

My suggestion would be as follows:

1) Use RUM to move the computer to a new domain

2) Prepare a tab delimited import file containing your source and target computer account names, a name column plus your new description

3) Process the above file using a migration session in which you select one of the "merge" options

I will give it a go.
Description is one thing, I need computer SID History & group memberships too. This might work.
Thanks for a hint.