Verify that external services for the SDDC, such as Active Directory, DNS, NTP, SMTP, and FTP/SFTP are available.
If a vSphere Storage APIs for Data Protection (VADP) based backup solution is deployed on the management cluster, verify that the solution is properly started and operational, following the vendor guidance.
What to do next
Verify the operational state of the SDDC components. See VMware Validated Design Operational Verification.