I followed to change Mac Id to 001A79 as change provider made to use 00:1E:B8?????? was not working. I updated saved it and it shows in the portal setup. Provider switched MAC to the new MAC I gave starting with 00:1A:79**** below is how I changed my Mac..
Go to Content Manager -> Content Sources -> choose your MAC/ID Sub ->
Edit -> Advanced Options/More Settings -> MAC ID ->
Replace first 6 chars with 001A79 and confirm with "Update" button.
Register new MAC ID on Provider side
When I try to use it I get a 1012 blocked message. on checking the portal I created is still there with changed Mac id , however when I try to create a new portal it shows the mac id as starting with 00:1E:B8****** even though my portal is still there with the changed Mac Id. Does this mean the Mac Id change did not take effect as I see my portal with changed Mac however if I try to add new shows the original. frustrated help please ..