Chris,
I doubt that the P class controller( 700m) is compatible with the MSA 2050.
HP Smart Array P741m - 4GB FBWC is the P Class controller that is tested and listed in the MSA supported matrix. Moreover, the tested/compatible P-class Smart Array controller works on Gen9 server hardware.
Please validate the hardware and software configuration on SPOCK.
The document contains information regarding compatibility and interoperability for a "configuration set" of MSA storage.
https://www.hpe.com/Storage/Spock/
Note:
In the unsupported configuration w.r.t operating system, driver and firmware versions for the hardware, you might experience unexplained behavior and results.
HPE might be unable to provide technical support if you use an unsupported feature or use a feature in an unsupported or undocumented manner.