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Se Lai

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C:\ Drive space on Exchange Server

Exchange Server C:\ drive suddenly fill-up, total capacity is 900GB but now it has only 2 GB free space.

Temp= empty
%temp%=empty
Clean desk
Databases on another drive
Exchange logs on another drive
No backup logs
No extra application installed

Windows server 2016 & Exchange Server 2016

What could be the reason? Please help.

Regards
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CompProbSolv
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I would start with TreeSize Free from jam-software.com.  It will catalog the drive and show you were all the space went.
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Michael B. Smith
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I use WinDirStat (+1 for providing MD5 / SHA1 hashes to verify your DL) for such emergencies.
I've had the CBS.log file balloon to enormous size before (c:\windows\logs\) on my prodcution servers, could be worth a look.
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Se Lai

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Michael B. Smith

The IIS logfiles consumed 696 GB space. shell i go and run the script or remove it manually.

Regards
Whatever you prefer :-)

Either works.
You can go into IIS Manager and then the Logging options and specify another folder to place those logs, in case you need them. Putting them to the C: drive can cause problems like what you ran into. You can also set up an automated task to clear them whenever you need.

Here's a great little guide from Microsoft - https://docs.microsoft.com/en-us/iis/manage/provisioning-and-managing-iis/managing-iis-log-file-storage
Hi

There are a number of log files that don't get truncated with backups. You can find my clear logs script on the technet gallery and it should clear a couple of gigs of space