If admin access has been lost due to a misplaced password, these steps will reset the SRA or SMA 100 series to factory defaults via SafeMode.
Here's how to reset the SRA or SMA 100 series system to factory defaults via SafeMode:
TIP: May Need to Power Off Device then try Reset Button Instuctions Below as you Power On Device

The default IP username is admin.
The default password is password.
TIP: Can Load fresh copy of firmware from mysonicwall account download center if either current firmware or backup firmware not loading correctly