If you are upgrading your NSX/vCenter environment, follow this article to de-integrate from your DCS environment before you upgrade.
Then follow the steps to re-integrate with the DCS environment after the vCNS environment is upgraded.
Data Center Security Server 6.7-6.9x
**Check the DCS Platform Feature Matrix for the version of DCS you are running, to ensure the version of vCenter & NSX you are upgrading to are supported by DCS
NSX/vCenter upgrade plan including DCS SVA de-integration:
If you are upgrading the DCS manager, follow the steps below to re-integrate with vCNS environment after it is upgraded:
Please collect the DCS manager logs (Collect Server Info) and contact support if you have any issues while de-integrating or re-integrating