No export from SEPM, just the straight up client install files from the download.
Here is my command line....
msiexec /i "Sep64.msi" RUNLIVEUPDATE=0 ADDLOCAL=Core,SAVMain,Download,OutlookSnapin,PTPMain,TruScan,DCMain,NTPMain,ITPMain,LANG1033 SYMREBOOT=ReallySuppress /qn /L*v C:\Path-to\SEP14.0.1904.LOG
I didn't have the RUNLIVEUPDATE=0 until more recently but it has no bearinig on the restart.