I am having issues with Receiving Emails on my Exchange 2016 Cu 22 Update 2 on Server 2012R2 On-site server. When I run a microsoft inbound SMTP Connectivity Test, I get the error of "Cannot Connect to Server, Connection Timeout"
With logs I narrowed it down to DNS issue. In the logs I get:
Event ID 205 & 16025
No DNS servers could be retrieved from network adapter d9b621ec-077a-40e5-997a-752e73b7e2f5. Check if the computer is connected to a network and Get-NetworkConnectionInfo returns any results.
Get-NetworkConnectionInfo
[PS] C:\Windows\system32>Get-NetworkConnectionInfo
RunspaceId : 5ebe2d5b-1a6a-4082-8d7f-ac4bea493805
Name : Intel(R) 82574L Gigabit Network Connection
DnsServers : {192.168.5.21}
IPAddresses : {192.168.5.25}
AdapterGuid : 24661cf0-0810-47c6-a3bc-0e8099591b34
MacAddress : 00:0C:29:E0:E9:A3
Identity : 24661cf0-0810-47c6-a3bc-0e8099591b34
IsValid : True
ObjectState : Unchanged
If I look at the current Guids and DNS for the Internal and External they look fine:
[PS] C:\Windows\system32>Get-TransportService| fl *dns*
ExternalDNSAdapterEnabled : False
ExternalDNSAdapterGuid : 24661cf0-0810-47c6-a3bc-0e8099591b34
ExternalDNSProtocolOption : Any
ExternalDNSServers : {1.1.1.1, 8.8.8.8}
InternalDNSAdapterEnabled : True
InternalDNSAdapterGuid : 24661cf0-0810-47c6-a3bc-0e8099591b34
InternalDNSProtocolOption : Any
InternalDNSServers : {192.168.5.21}
DnsLogMaxAge : 7.00:00:00
DnsLogMaxDirectorySize : 100 MB (104,857,600 bytes)
DnsLogMaxFileSize : 10 MB (10,485,760 bytes)
DnsLogPath :
DnsLogEnabled : False
For whatever reason, even if I change the GUID to 000 meaning use any interface, using this command:
Get-TransportService -Identity SVR-EXCH01 | Set-TransportService -InternalDNSAdapterGUID 00000000-0000-0000-0000-000000000000 -ExternalDNSAdapterGUID 00000000-0000-0000-0000-000000000000
And Reboot, I still get the same error in the eventlog with the same GUID. The guid changed recently because I was forced to reinstall the operating system. Anyway, anyone have any ideas of a manual, unorthodox approach to getting this guid changed and sticking?
Thanks For the Help. Cheers
-C