Haven't performed this yet, but you should be safe restoring data from 6.3.3 directly onto a new instance of 7.0. Below are the supported upgrade paths:
- AAM 7.0 (Load 16) Avaya Virtualization Platform to AAM 7.0 Avaya Virtualization Platform (Load 17)
- AAM 6.3.3 System Platform to AAM 7.0.0 Avaya Virtualization Platform
- AAM 6.3.3 System Platform to AAM 7.0.0 Virtualization Enablement
- AAM 6.3.3 Virtualization Enablement to AAM 7.0.0 Avaya Virtualization Platform
- AAM 6.3.3 Virtualization Enablement to AAM 7.0.0 Virtualization Enablement
- AAM 6.3.2 System Platform to AAM 7.0.0 Avaya Virtualization Platform
- AAM 6.3.2 System Platform to AAM 7.0.0 Virtualization Enablement
- AAM 6.2.5 System Platform to AAM 7.0.0 Avaya Virtualization Platform
- AAM 6.2.5 System Platform to AAM 7.0.0 Virtualization Enablement