> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://helpdesk.abtutor.cloud/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# AB Tutor V10 (On-Prem): Clients are appearing as offline when machines are turned on

This can be due to a few questions. First please check that:

* The AB Tutor Client Service is running on the machine
* This device is not listed inside the Central Server's web UI request list.
* There are not two copies of the same device inside the 'All Items' view where one of them is offline and the other is online. 
If you are still having issues please email support@abtutor.com for assistance.