Windows Server 2012 and R2: How to check windows deduplication

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Connect your server and open roles tab. You can check here!

https://itbrotherss.files.wordpress.com/2018/09/screenshot_1.png

Other way, Disk> and right click deduplication settings. Check here if marked checkbox.

https://itbrotherss.files.wordpress.com/2018/09/screenshot_2.png

and we can check from powershell with this commands.

https://itbrotherss.files.wordpress.com/2018/09/screenshot_3.png

If the backup software we are using uses deduplication, do not activate a double deduplication on the server.