factory reset SG105 without access

Question

I have to repurpose an SG105 Sophos firewall running a recent version of UTM. I do not have the admin credentials on the machine, the old admin is no longer with the company. 
 Is it possible to do a factory reset of an SG105 so that I can re-initialize it. 
 What is the process? 
 The only instructions online assume we have SSH and or Webadmin access which I do not have.

Raphael Alganes · Answer

Hello, 
 You may follow this KBA on how to reset admin password: https://support.sophos.com/support/s/article/KB-000034260?language=en_US 
 Then you can backup configuration before following this reimage process: https://support.sophos.com/support/s/article/KB-000034331?language=en_US 
 If it's a sole repurpose and existing configuration doesn't matter, you may follow straight to this reimage process: https://support.sophos.com/support/s/article/KB-000034331?language=en_US 
 Regards,