High disk space occupation on Exchange

Mariusz Gora 41 Reputation points

I have Microsoft Exchange Server 2016 on-premise.
During installation couple years ago I set up 90GB disk for OS and Exchange binaries and separate disk for mailbox databases.

Currently I have only 14% free space on system drive. From time to time server system drive fills up and I occurs Back Pressure issue.
The biggest catalogues are Windows (over 25GB) and %ExchangeInstallPath% (almost 30GB).
On this disk I keep Queue Database (in my case not more than 2GB, so is isn't so big) other mailbox databases are on dedicated separate disk.

I free-up this disk as much as I can (remove unused applications, unused users accounts, empty trash, etc.) but I can't go over 15% free space.

Is there anything can I do to free-up more disk space? Especially to reduce %ExchangeInstallPath% and Windows directory size.

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Amit Singh 3,731 Reputation points

    How often do you take full backup? The logs can take up a lot of space and are truncated after a full backup. So if you are not regularly doing a full backup, then your logs will keep accumulating.
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  2. Andy David - MVP 121K Reputation points MVP

    Follow this to clear some space and create a scheduled task to clear on a regular basis