WS 2016 unable to receive updates from Wsus error code 0x800705b4

Question

Hi.

We've Cross forest WSUS serve another forest. some of windows server 2016 devices when we check for updates we get the below error

BlockquoteThere were some problems installing updates, but we'll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: (0x800705b4)
Blockquote

Group Policy applied correctly and the clients are able to reach WSUS server but we noticed those devices in WSUS MMC console status are ( not reported yet).

we configured WSUS to push Critical and security updates only.

another question does cumulative update is important to windows servers and is their updates depends on other updates to be installed.

Thanks

Answer 1

Hi AhmedEssam-4837,

Thanks for your posting on Q&A.

Based on the current situation, we may try the following steps to resolve the issue that the client does not report properly.
1> Check if you are prompted for file downloading when browse the following link on the client.
http://YourWSUS:portnumber/selfupdate/iuident.cab

2> Remove clients from WSUS console and run the following script in the elevated CMD on the affected clients. Wait a while and check if it works.

net stop bits
net stop wuauserv
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v AccountDomainSid /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v PingID /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v SusClientId /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v SusClientIDValidation /f
rd /s /q "C:\WINDOWS\SoftwareDistribution"
net start bits
net start wuauserv
wuauclt /resetauthorization /detectnow
usoclient.exe startscan

3>Please refer the following link to cleanup the database:
https://social.technet.microsoft.com/Forums/windowsserver/en-US/7706ad3a-f22f-4fda-9050-eede6cda553b/how-to-filter-out-older-updates?forum=winserverwsus

Hope my answer could help you and look forward to your feedback.

Regards,
Rita

Answer 2

Hi AhmedEssam-4837,

Thanks for your response.

Could we try to follow the below link to reset the Windows Update and then check for updates on the clients?

Reference link: https://gallery.technet.microsoft.com/scriptcenter/Reset-WindowsUpdateps1-e0c5eb78

Regards,
Rita