Redirection of mail...

My girlfriend has, for a while now, had all her emails from her personal email acc (microsoft office) redirected to her work email address. She does not remember how she activated this in the first place and now wants to cancel this redirection. All the sugestions I have found relate to turning off the "Rule & Alert" she had previously created, however, I have opened this area and found no such rule had been created and therefore can not delete it.
This is very frustrating and I am hoping that someone might know how I can go about fixing this for her. She no longer wants her private emails automatically redirected to her work email address. Please help!!!