Hi,
You can downgrade, but it depend on your media for the next step. (retail vs VL vs OEM)
Please see that link;
http://www.microsoft.com/oem/fr-ca/licensing/sblicensing/pages/downgrade_rights.aspx#fbid=4ej9DrEQ_R6?hashlink=server
In big;
- If a VL, you can call Microsoft licensing and they will generate you another key for the 2008R2 in your VL's account.
- If OEM, you need to call your revendor to get the media kit to re-install.
- If retail you can use a a retail kit you have to downgrade.
Regards, Philippe
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