IPAM Account Permissions for DNS Management

I am trying to configure the DNS management aspect of IPAM and to do this I need to add a DNS server.  We do not use SolarWinds to monitor the DNS servers but I have added one as a node for this purpose.  I am unsure how to configure the user credentials, I am given the following three options.


Does anybody know which is best and the permissions needed?  When I configured DHCP management I could simply use a windows credential which seemed to make more sense.