VOX

Thanks for info eduncan :)

so then ıncremental has a advantage because if ı want to restore something between fullbackup and dailys in incremental ı just have to find to which day ı wanna restore but on cumulative it takes long i think. am i right ?

and there must be a reason side of exchange server operation 

yeah ı see this, thank you but generally no one use cumulative backup when they are backuping the exchange server