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Datto RMM: RDP connection fails with "An internal error has occurred"

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Issue

When you connect to another device using the Remote Desktop Protocol (RDP), you receive the error message, "An internal error has occurred."

Environment

  • Datto RMM

Cause

The Microsoft security update (KB4103727) that addressed CVE-2018-0886 will prevent devices patched with this update from communicating with unpatched devices.

Resolution

Either update the unpatched device, or create a Group Policy rule that reverts this change as shown in the Microsoft article for CredSSP updates for CVE-2018-0886 (external link).

You can verify that an unpatched device experienced this issue by looking at its event logs in Windows. Look for Event ID 6041.

Figure 1: Event ID 6041 (click to enlarge)


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