You can Disable Remote Access on your mobile device to temporarily prevent users from connecting to it. Device will remain in the computer list of accounts with granted access, however they will not be able to connect to the device until Remote Access is enabled again.
Step 1:
Click on the "Menu" button in the upper right corner.
Step 2:
Select "Remote access" from the dropdown menu.
Step 3:
Click on "Remote Access Enabled".
Step 4:
Proceed with clicking Disable.
Step 5:
Remote Access should now be disabled.