I am playing with Azure, and have installed a lab enviroment. Have been testing Exchange 2013 Preview, and I have noticed that the C: drive space was consumed up very fast. And on Azure default space is 30GB so the disk was running empty quite fast:)
Since I had turned on Circular Logging, I know there must be some l logging files filling up my drive.
Found many .dmp files under
C:Program FilesMicrosoftExchange ServerV15Dumps
Mostly:*activesyncselftestrestartwebapppool.dmp *outlookmailboxctprestart.dmp *outlookarchivectprestart.dmp *owaselftestrestart.dmp
After some research I found out that this is diagnostics etc. during development and beta testing. So no problem with deleting this files, if everything seems to be running smoothly.