Cannot move subassembly as a whole.
Solution
The 'Move Subassembly Components' button in the Move command bar enables direct movement of occurrences within subassemblies. It is off by default.
Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: n/a
Product: SOLID_EDGE
Application: ASSEMBLY
Version: V221.0
Function: COMPONENTS
Ref: 001-10107807