Unmanaged devices - Client doesn`t appear in Central Admin

Question

Hi 
 I have in my Sophos central a device in "unmanaged devices" 
 I checked the agent and i haven't errors. 
 I tried to unistall agent but i don't be able because tamper is enable and by console i can't because devices in "unmanged devices" can't to be modify. 
 The agent is connect correctly on local panel 
 
 Thanks 
 Roberto

GlennSen · Answer

Thank you for reaching the community, The possible reason for this unmanaged device was you have ad sync active in your environment, so it imports all devices from your AD to central. However, since the package that has been used on this device isn&rsquo;t the package that came from the Sophos central you used to manage, it won't be able to manage this device and will show unmanaged. To correct this, you may need to check if you have any other Sophos central account you used before either trial or license and validate that the said device is managed under those accounts. If so? Then you can retrieve the TP and register the device under your Sophos central account that you used to manage via re-installation of the package or via running (--registeronly) switch on the command prompt. If the above scenario is not applicable, you may need to manually recover the tamper protection password on this device by following this community article. And proceed with the reinstallation of the endpoint.