*URGENT* Windows 10 April 2018 Update broke RDP credentials to Remote Desktop server

Good morning,

Since this morning we have been flooded with calls about Windows 10 RDP issue.
All Windows 10 users who have been updated to the Windows 10 April 2018 Update are experiencing remote desktop issues when connecting to a server.
Their saved passwords are not being passed on to the server and are now being prompted on the server to enter username and password.
This is only happening in Windows 10 clients. Windows 7 does not produce that error.

This is a huge problem ads our clients rely on RDP connections to work and they do not have access to the usernames and password.

Anybody having that issue? A solutions would be greatly appreciated.

Thanks.

P.S.  We have attempted to change the Credentials Delgations (forcing TERMSRV/*) on the client PCs but did not work.
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TSIsolutionsAsked:
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McKnifeCommented:
Problem are sleepy admins who don't follow the news. Sorry, not to be taken personal.
Please read: https://support.microsoft.com/en-us/help/4093492/credssp-updates-for-cve-2018-0886-march-13-2018
May 8, 2018 An update to change the default setting from Vulnerable to Mitigated.
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Omar SoudaniSystem Support EngineerCommented:
Can you check if you have KB4103721 installed, when you go and check for updates is this KB available?
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Have you been patching the RDS server?
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JohnBusiness Consultant (Owner)Commented:
Windows 10 V1803 Build 17134.1 (a week ago) works fine and Remote Desktop Connection works fine. You may have to uncheck Printers under Local Resources in Remote Desktop options.

I had to remove KB4103721 (17134.48) this morning as it appears to be bugged. It this is the update you are referring to, you may need to roll back.
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TSIsolutionsAuthor Commented:
Good morning,

Thanks for your replies. I have not checked every client PC (as we are serving more than 450) but it seems to come from the way the credentials are kept on the client PC. We have found a workaround by deleting the existing password and re-entering it. but this is going to take days to fix on all stations and we have to wait until the update is done (or force the update) before making the changes.
Even uninstalling a KB would probably take even longer... damn Microsoft!

I was hoping there was an easier fix.
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Cliff GaliherCommented:
Microsoft has been beating the drum on the effects that their CredSSP patches (yes, oral) would be having. There isn't anything broken... But there are necessary "matching" patches on client and server and some expected behavior changes.
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JohnBusiness Consultant (Owner)Commented:
The latest update (17134.48) is causing issues.

https://www.windowslatest.com/2018/05/09/windows-10-kb4103721-bugs/
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Cliff GaliherCommented:
Unrelated to RDP though. Apples and oranges.
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JohnBusiness Consultant (Owner)Commented:
I was unable to test Remote Desktop on 17134.48 but it is working fine (using it now) on 17134.1
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TSIsolutionsAuthor Commented:
It looks like there was an RDP exploit that was patched causing users to have to re-enter their credentials. Initially we thought it was only related to Windows 10 but it turns out its all Windows OS that are affected by the update:

https://www.theregister.co.uk/2018/03/23/microsoft_rdp_patch_credential_security_support_provider_protocol/
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Lee W, MVPTechnology and Business Process AdvisorCommented:
As I said, have you been patching the server?  After I patched my server, the connection was fine.
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Pete LongTechnical ConsultantCommented:
>>Their saved passwords are not being passed on to the server and are now being prompted on the server to enter username and password.

Do you have a screenshot of the error?
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Pete LongTechnical ConsultantCommented:
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Rahul VaidyaCommented:
Thank you, I was getting really sick of re-typing saved passwords.
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