Hi,
IP address ranges are automatically entered into the IPAM database when DHCP scopes are discovered on managed DHCP servers. You may reference link below and make sure that you have finished the steps from 1 to 10 which are listed:
https://technet.microsoft.com/en-us/library/jj878313.aspx
Besides, IP address blocks and individual IP addresses are not automatically added to the IPAM database, and IP address ranges that are not DHCP scopes on managed Microsoft DHCP servers are not automatically discovered.
IPAM provides several dialogs to allow you to enter and edit IP address data manually, and you can also import IP address data directly from a file. Details you may reference:
https://technet.microsoft.com/en-us/library/jj878303.aspx
Best Regards,
Eve Wang
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