Hi,
I have the same "error 500 / GIM Domain is NULL" problem, but I have configured like Rodney said.
XMC & GIM are both version 4.2.6
XMC server.log:
2019-06-19 14:11:11,546 ERROR [com.enterasys.netsight.tam.server.web.rs.GimTemplatesRSServiceImpl] GIM Domain is NULL
GIM = 192.168.64.212
![00edb05274a947a691192fa96bcfb848_fbde51c5-b96b-4816-88d3-0b7100a16c66.jpg 00edb05274a947a691192fa96bcfb848_fbde51c5-b96b-4816-88d3-0b7100a16c66.jpg](/t5/image/serverpage/image-id/4100i87064CAA09B3ED42/image-size/large?v=v2&px=999)
dedicated NAC for guest stuff = 192.168.64.204
XMC is also in same subnet.
![00edb05274a947a691192fa96bcfb848_a981bdb9-3ed3-410a-8e60-82519ecde1ee.jpg 00edb05274a947a691192fa96bcfb848_a981bdb9-3ed3-410a-8e60-82519ecde1ee.jpg](/t5/image/serverpage/image-id/5864iFEED4F9CB8A671AC/image-size/large?v=v2&px=999)
Guest and IoT Config is provided with a domain and a password repository:
![00edb05274a947a691192fa96bcfb848_f14d3e15-e2a5-4972-b1eb-16e02780bb9b.jpg 00edb05274a947a691192fa96bcfb848_f14d3e15-e2a5-4972-b1eb-16e02780bb9b.jpg](/t5/image/serverpage/image-id/1949i6E26F82773C10FD6/image-size/large?v=v2&px=999)
This password repository contains one User, which is enabled, but has no GIM checkmark.
Engine group "Gäste-NAC" has an own AAA configuration ("Gastportal AAA") which puts requests from location GIM to local auth "GIM_repository". I have no LDAP configs there since I test with local reository only.
![00edb05274a947a691192fa96bcfb848_48c4ac64-4f22-4af9-a223-e64729183b5e.jpg 00edb05274a947a691192fa96bcfb848_48c4ac64-4f22-4af9-a223-e64729183b5e.jpg](/t5/image/serverpage/image-id/2777iB6B35EE7258F6E0B/image-size/large?v=v2&px=999)
Location group "GIM" contains: switch 192.168.64.212, Port: *, AP ID: *
Everthing is enforced, but I still get error: "Error fetching Guest Users. Error on Access Control Engine/XMC.
Please check to make sure that your GIM configuration (Manager and GIM domain) on XMC is set correctly."
Does anyone have an idea?