When trying to push the Antivirus software onto a machine we had re-imaged, we experienced the following problem.
The Enterprise Console would find the machine using the new IP address, but once the Antivirus attempted to download onto the machine, the Console would not recognize the "new" machine's address. Therefore the Antivirus could not be installed and would error out claiming we did not have administrative rights to the machine or that the username/password was incorrect.
We then found the old computer name in the Sophos database under the Database Sophos52 and the Table ComputersandDeletedComputers. There were multiple entries, one of which was using the old IP address for this Computer Name.
This would seemingly change the attempted installation from pointing to the correct IP address to the old and now non-existent IP address. We believe this was happening because the Forward and Reverse DNS lookups for the old machine were still mapped to this 'incorrect' IP address. We removed both of these lookups.
Step 1: Deleted the rows that contained this old Computer Name
Step 2: Deleted the Forward and Reverse DNS lookups for the old Computer name
Step 3: Rediscover the new machine using the new IP range.
Step 4: Antivirus installation should succeed.
