How to set the retentions for the Windows server backup?

This is using MS Windows Server Backup on Windows server 2012 r2. The window server backup is used to backup C:\, and E:\Exchange databases, and this scheduled backup is seems working fine. The backup destination is a network mapped drive, with total disk space of 1.2 TB, which is enough to store, let's say more 2 weeks' data.

I was running the Windows server backup wizard, in which I have to go to the task scheduler to modify from every single schedule backup on each day to only Monday to Friday. However, I don't see any settings for retentions. If I want to have a data retentions for let's say, 20 days, how can i set it?

Thanks in advance.
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MichaelBalackAsked:
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MaheshArchitectCommented:
As far as I know you cannot set retention with Windows Server Backup in 2k8\2k8R2\2K12\2K12R2

In TechNet link it says:
If you are backing up to a hard disk or volume you can specify a deletion policy to determine whether backups should be deleted only when necessary to make space for additional backups or if they should be deleted after a certain number of backups have passed.
https://technet.microsoft.com/en-us/library/jj614621.aspx

But I never found this feature with W2K12 and W2K12R2, it might available in Windows online backup feature with Azure
http://blogs.technet.com/b/canitpro/archive/2013/09/19/step-by-step-setup-the-online-backup-service-for-windows-server-2012.aspx

You need to use DiskShadow utility to manually delete old backup copies (Shadows Copies)
http://www.bluecompute.co.uk/blogposts/windows-server-backup-manually-delete-snapshots/
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Lior KarasentiCommented:
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MichaelBalackAuthor Commented:
Hi Mahesh,

The diskshadow utility looks promising. Please give me sometimes to explore and update you later on.
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MichaelBalackAuthor Commented:
Thanks to Mahesh. I using his method to manually remove images to avoid disk space running out.
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