All of sudden, I have some servers that cannot communicate with WSUS that are on a different subnet. This hasn't been an issue in the past and seems to have started 12 days ago or so.
Here is an excerpt of WindowsUpdate.log from one of the servers:
2019-04-11
05:27:07:137
844
36b0
Agent
WARNING: SleepStudyTracker: Machine is non-AOAC. Sleep study tracker disabled.
2019-04-11
05:27:07:137
844
36b0
Agent
* Base directory: C:\Windows\SoftwareDistribution
2019-04-11
05:27:07:137
844
36b0
Agent
* Access type: No proxy
2019-04-11
05:27:07:137
844
36b0
Service
UpdateNetworkState Ipv6, cNetworkInterfaces = 1.
2019-04-11
05:27:07:137
844
36b0
Service
UpdateNetworkState Ipv4, cNetworkInterfaces = 1.
2019-04-11
05:27:07:137
844
36b0
Agent
* Network state: Connected
2019-04-11
05:27:07:137
844
36b0
Service
UpdateNetworkState Ipv6, cNetworkInterfaces = 1.
2019-04-11
05:27:07:137
844
36b0
Service
UpdateNetworkState Ipv4, cNetworkInterfaces = 1.
2019-04-11
05:27:07:152
844
36b0
Misc
WARNING: Network Cost is assumed to be not supported as something failed with trying to get handles to wcmapi.dll
2019-04-11
05:27:07:152
844
40a4
Agent
*********** Agent: Initializing global settings cache ***********
2019-04-11
05:27:07:152
844
40a4
Agent
* Endpoint Provider: 00000000-0000-0000-0000-000000000000
2019-04-11
05:27:07:152
844
40a4
Agent
* WSUS server: <NULL>
2019-04-11
05:27:07:152
844
40a4
Agent
* WSUS status server: <NULL>
2019-04-11
05:27:07:152
844
40a4
Agent
* Target group: (Unassigned Computers)
2019-04-11
05:27:07:152
844
40a4
Agent
* Windows Update access disabled: No
2019-04-11
05:27:07:168
844
36b0
WuTask
WuTaskManager delay initialize completed successfully..
2019-04-11
05:27:07:168
844
36b0
AU
Timer: 31DA7559-FE27-4810-8FF6-987195B1FD98, Expires 2019-04-11 15:56:36, not idle-only, not network-only
2019-04-11
05:27:07:168
844
36b0
AU
Timer: CF1ABEC6-7887-4964-BB93-B2E21B31CEC1, Expires 2019-04-12 02:28:01, not idle-only, not network-only
2019-04-11
05:27:07:168
844
36b0
AU
Timer: 29A863E7-8609-4D1E-B7CD-5668F857F1DB, Expires 2019-04-12 02:27:59, not idle-only, not network-only
2019-04-11
05:27:07:168
844
36b0
Report
CWERReporter::Init succeeded
2019-04-11
05:27:07:168
844
36b0
Agent
*********** Agent: Initializing Windows Update Agent ***********
2019-04-11
05:27:07:168
844
36b0
DnldMgr
Download manager restoring 0 downloads
2019-04-11
05:27:07:168
844
36b0
AU
########### AU: Initializing Automatic Updates ###########
2019-04-11
05:27:07:168
844
36b0
AU
Additional Service {117CAB2D-82B1-4B5A-A08C-4D62DBEE7782} with Approval type {Pre-download notify} added to AU services list
2019-04-11
05:27:07:168
844
36b0
AU
AIR Mode is disabled
2019-04-11
05:27:07:168
844
36b0
AU
# Approval type: Scheduled (User preference)
2019-04-11
05:27:07:168
844
36b0
AU
# Auto-install minor updates: Yes (Policy)
2019-04-11
05:27:07:168
844
36b0
AU
# ServiceTypeDefault: Service 117CAB2D-82B1-4B5A-A08C-4D62DBEE7782 Approval type: (Pre-download notify)
2019-04-11
05:27:07:168
844
36b0
AU
# Will interact with non-admins (Non-admins are elevated (User preference))
2019-04-11
05:27:07:168
844
36b0
Misc
WARNING: IsSessionRemote: WinStationQueryInformationW(WTSIsRemoteSession) failed for session 6, GetLastError=2250
2019-04-11
05:27:07:183
844
36b0
AU
WARNING: Failed to get Wu Exemption info from NLM, assuming not exempt, error = 0x80240037
2019-04-11
05:27:07:183
844
36b0
AU
WARNING: Failed to get Network Cost info from NLM, assuming network is NOT metered, error = 0x80240037
2019-04-11
05:27:07:183
844
36b0
AU
AU finished delayed initialization
2019-04-11
05:27:07:183
844
36b0
AU
Currently AUX is enabled - so not show any WU Upgrade notifications.
2019-04-11
05:27:07:183
844
36b0
AU
WARNING: Failed to get Network Cost info from NLM, assuming network is NOT metered, error = 0x80240037
2019-04-11
05:27:07:183
844
36b0
AU
WARNING: Failed to get Network Cost info from NLM, assuming network is NOT metered, error = 0x80240037
2019-04-11
05:27:07:183
844
518c
DnldMgr
Asking handlers to reconcile their sandboxes
2019-04-11
05:37:07:194
844
46b8
AU
Earliest future timer found:
2019-04-11
05:37:07:194
844
46b8
AU
Timer: 31DA7559-FE27-4810-8FF6-987195B1FD98, Expires 2019-04-11 15:56:36, not idle-only, not network-only
2019-04-11
05:37:08:194
844
36b0
AU
########### AU: Uninitializing Automatic Updates ###########
2019-04-11
05:37:08:210
844
36b0
WuTask
Uninit WU Task Manager
2019-04-11
05:37:08:226
844
36b0
Agent
Sending shutdown notification to client
2019-04-11
05:37:08:226
4388
7ec
COMAPI
WARNING: Received service shutdown/self-update notification.
2019-04-11
05:37:08:226
844
36b0
AU
Earliest future timer found:
2019-04-11
05:37:08:226
844
36b0
AU
Timer: 31DA7559-FE27-4810-8FF6-987195B1FD98, Expires 2019-04-11 15:56:36, not idle-only, not network-only
2019-04-11
05:37:08:241
844
36b0
AU
Earliest future timer found:
2019-04-11
05:37:08:241
844
36b0
AU
Timer: 31DA7559-FE27-4810-8FF6-987195B1FD98, Expires 2019-04-11 15:56:36, not idle-only, not network-only
2019-04-11
05:37:08:288
844
36b0
Service
*********
2019-04-11
05:37:08:288
844
36b0
Service
** END ** Service: Service exit [Exit code = 0x240001]
2019-04-11
05:37:08:288
844
36b0
Service
*************
2019-04-11
05:57:07:191
844
5b0c
Misc
=========== Logging initialized (build: 7.9.9600.19164, tz: -0400) ===========
2019-04-11
05:57:07:191
844
5b0c
Misc
= Process: C:\Windows\system32\svchost.exe
2019-04-11
05:57:07:191
844
5b0c
Misc
= Module: c:\windows\system32\wuaueng.dll
2019-04-11
05:57:07:191
844
5b0c
Service
*************
2019-04-11
05:57:07:191
844
5b0c
Service
** START ** Service: Service startup
2019-04-11
05:57:07:191
844
5b0c
Service
*********
2019-04-11
05:57:07:207
844
5b0c
IdleTmr
Non-AoAc machine. Aoac operations will be ignored.
2019-04-11
05:57:07:207
844
5b0c
Agent
* WU client version 7.9.9600.19164
2019-04-11
05:57:07:207
844
5b0c
Agent
WARNING: SleepStudyTracker: Machine is non-AOAC. Sleep study tracker disabled.
2019-04-11
05:57:07:207
844
5b0c
Agent
* Base directory: C:\Windows\SoftwareDistribution
2019-04-11
05:57:07:207
844
5b0c
Agent
* Access type: No proxy
2019-04-11
05:57:07:207
844
5b0c
Service
UpdateNetworkState Ipv6, cNetworkInterfaces = 1.
2019-04-11
05:57:07:207
844
5b0c
Service
UpdateNetworkState Ipv4, cNetworkInterfaces = 1.
2019-04-11
05:57:07:207
844
5b0c
Agent
* Network state: Connected
2019-04-11
05:57:07:207
844
5b0c
Service
UpdateNetworkState Ipv6, cNetworkInterfaces = 1.
2019-04-11
05:57:07:207
844
5b0c
Service
UpdateNetworkState Ipv4, cNetworkInterfaces = 1.
2019-04-11
05:57:07:223
844
5b0c
Misc
WARNING: Network Cost is assumed to be not supported as something failed with trying to get handles to wcmapi.dll
2019-04-11
05:57:07:223
844
403c
Agent
*********** Agent: Initializing global settings cache ***********
2019-04-11
05:57:07:223
844
403c
Agent
* Endpoint Provider: 00000000-0000-0000-0000-000000000000
2019-04-11
05:57:07:223
844
403c
Agent
* WSUS server: <NULL>
2019-04-11
05:57:07:223
844
403c
Agent
* WSUS status server: <NULL>
2019-04-11
05:57:07:223
844
403c
Agent
* Target group: (Unassigned Computers)
2019-04-11
05:57:07:223
844
403c
Agent
* Windows Update access disabled: No
2019-04-11
05:57:07:223
844
5b0c
WuTask
WuTaskManager delay initialize completed successfully..
2019-04-11
05:57:07:223
844
5b0c
AU
Timer: 31DA7559-FE27-4810-8FF6-987195B1FD98, Expires 2019-04-11 15:56:36, not idle-only, not network-only
2019-04-11
05:57:07:223
844
5b0c
AU
Timer: CF1ABEC6-7887-4964-BB93-B2E21B31CEC1, Expires 2019-04-12 02:28:01, not idle-only, not network-only
2019-04-11
05:57:07:223
844
5b0c
AU
Timer: 29A863E7-8609-4D1E-B7CD-5668F857F1DB, Expires 2019-04-12 02:27:59, not idle-only, not network-only
2019-04-11
05:57:07:223
844
5b0c
Report
CWERReporter::Init succeeded
2019-04-11
05:57:07:223
844
5b0c
Agent
*********** Agent: Initializing Windows Update Agent ***********
2019-04-11
05:57:07:223
844
5b0c
DnldMgr
Download manager restoring 0 downloads