I have two domains controllers. They both are having the same issue.
When I log into DHCP the icon is green and looks normal
When I expand the icon it turns blue with an exclamation mark
I looked at display statistics for all scopes and there is plenty 90% free on all scopes.
I know Microsoft says the below about the blue icon with exclamation mark......
DHCP server alert. No addresses are available from server scopes because the maximum (100 percent) of the addresses allocated for use are currently leased. This represents a failure of the DHCP server on the network because it is not able to lease or service clients
from here- > https://technet.microsoft.com/en-us/library/gg722802(v=ws.10).aspx
This is not my issue. I have plenty of addresses.