Important Note: Before you start this work make sure you have a full backup of vCenter and backup of Database.
Logon to MyVMware and download VMware-VCSA-all-6.7.0-10244745.iso (latest version).

Once downloaded Mount iso (by right clicking on file and selecting mount)

Copy migration-assistant to C drive

Goto migration-assistant folder on C drive and double click on VMware-Migration-Assistant.

You should then get the screen above. Then minimise the screen DO NOT CLOSE THIS CONSOLE UNTIL THE MIGRATION IS COMPLETE.

Goto CD drive VMware VCSA – vcsa-ui-installer – win32 – double click on installer.exe

Click on Migrate

Select Deploy appliance and Next

Accept the terms of Licence aggreement and click Next

Enter your Window vCenter FQDN, Username and Password and click Next

Yes

Enter details for ESXi host where you want to install vcsa

Yes

Enter Name for vcsa, root password and confirm root password. Next
Choose deployment size

Selct Datastore for vcsa. Next

Enter network details. Step 4 you will need to provide a tempory IP address for vcsa at the end of the migration vcsa will have the original IP of your vCenter.

Check details are correct before clicking Finish

Progress bar will now show

Click Continue

Next

Next

Enter details to join vcsa to AD Domain. Next

Select Migration Data. Next

This one is up to you, I would recommend you join CEIP. Next

Make sure you have done what step 1 says before you tick this box. Finish

OK

Progress bar for Data transferfro vCenter to new vcsa

Click on Launch VSPher Client (HTML5) to access your new vcsa