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radius error "External DB user access denied (Machine Access Restriction)"

Dear All,

Could anyone help me with my problem ?

I have configured my ACS to run as radius with external databases. I also have configured unknown user policy and database group mapping, switch and client PC.

But one thing I haven't configured setup cetificate in the ACS server...

Then I PC unable to connect to the network "connection limited" appear on my network icon and when I check into ACS report I found this message "External DB user access denied (Machine Access Restriction)" from there I can already see my name and my ip switch number.

is this problem caused by certificate that I haven't done as I use PEAP MS-CHAP2 authentication ?

Thanks and Best Regards,