Native move collection fails to create move requests but shows no errors (4247188)

On attempt to move the mailbox it has the 'Migration Stage' of 'In Progress' and that does not change. Nothing is happening, no move requests actually exist and no errors are present in the MAgE.log

Upon closer inspection of MAgE log it can be observed that Powershell requests are not completing, i.e. any activity ends on the line saying "PowerShell runspace state changed to 'Opening' " but it is never followed by success or failure

Log file is looking similar to the following:

2017-10-04    09:47:15.0650    PxAFC    Tx23    A5    C1    M3    Info    Uri: http://exchange01/powershell?serializationLevel=Full, Cred: company\svc_qmm   
2017-10-04    09:47:15.1275    PxAFC    Tx23    A5    C1    M3    Trace    >PowerShell runspace state changed to 'Opening'. Reason: ''

2017-10-04    09:47:15.1275    PxAFC    Tx23    A5    C1    M3    Trace    Loaded assembly 'System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=a03e5f7f21d50a3a'.    
2017-10-04    09:47:22.9154    PxAFC    TxB    A5    C1    M3    Info    All mailboxes are completely processed or being processed now according to criteria defined by minimum processing intervals for MAgE.    
2017-10-04    09:47:39.4528    PxAFC    TxB    A5    C1    M3    Info    All mailboxes are completely processed or being processed now according to criteria defined by minimum processing intervals for MAgE.    
2017-10-04    09:47:55.9725    PxAFC    TxB    A5    C1    M3    Info    All mailboxes are completely processed or being processed now according to criteria defined by minimum processing intervals for MAgE.    
2017-10-04    09:48:12.4968    PxAFC    TxB    A5    C1    M3    Info    All mailboxes are completely processed or being processed now according to criteria defined by minimum processing intervals for MAgE.