For users that need email signature in OWA and on emails sent from Smartphones, but only run sign.exe occasionally (or never). 

Batch will simulate deployment of email signatures and users will appear in the Status Monitor.

How to 

Only supported distribution lists are shown.

Enable the group where you want to run sign.exe in batch.

Create a HKCU registry key and execute sign.exe:  

HKEY_CURRENT_USER\SOFTWARE\Office add-on\eMailSignature Key 'RunBatch' type REG_SZ