The first time you or your users run OneNote 2013 they may get a dialog box that says, “You’re not connected to the internet. Your notebook will be created on this computer and will not sync to the cloud or to your phone.”
Unfortunately there is no Group Policy setting in the Office 2013 Administrative Templates to suppress this message. However it can be suppressed by using a Group Policy Preference to push a registry setting. The key if HKCU\Software\Microsoft\Office\15.0\onenote. The value type is REG_DWORD & the name is FirstBootStatus. Set the Value data to 0x1000101 or 16777473 in binary. Be sure to put a check by “Run in logged-on user’s security context” & type a description.
Warning: This post deals with editing the registry. If you don’t know what that is stop right here & ask someone else to help you. Using the registry incorrectly can cause serious problems that may require you to reinstall Windows. Use the registry at your own risk.
Pick the image you want to use & save it so that it is 250KB or less. (Paint.net is a great photo editor.) Name the file backgroundDefault.jpg. Copy it to C:\Windows\System32\oobe\info\backgrounds. Create any folders in that path that do not exist.
Open regedit & browse to HKLM\SOFTWARE \Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background. Create a REG_DWORD called OEMBackground & give it a value of 1. Close regedit.
Now lock your session & you should see the custom background. No reboot needed.
You can also use a GPO instead of editing the registry. Browse to Computer Configuration>Administative Templates>System>Logon & enable Always use custom logon background.