Forum Discussion
Defender not updating - ValidateMapsConnection failed to establish a connection to MAPS
Microsoft Defender is not updating. When I click "Check for updates" in the window "Windows Security / Virus & threat protection" under "Virus & threat protection updates", Defender searches for upd...
I could check now. Other computers behind the same Firewall are working smoothly. The error occours only on one computer. I completely deactivated the software firewall on that computer but that didn't help.
HeikeRitter
Microsoft
MicrosoftIf this is really just one device, you will need to do more troubleshooting or contact our support. Did you have a look at the docs page will lots of troubleshooting scnearios? https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/troubleshoot-onboarding?view=o365-worldwide