DFSR backup.

I am not abe to backup the DFSR folder which are shared in the root DFSR server.

I have three DFSR server one of which has the 90% of te DFSR Data,

I am not able to see that DSFR shares in the selection lsit of creating the backup.

Can any one suggest the solution

Thanks in Advance.

NOTE:none of this servers are replicating the DATA.