Reporting Historic Data/ Data more than 2 weeks old doesn't show Solved Locked

I've been asked to report on data from the beginning of the year (2+ months old now) and currently on any report I run it only shows me back to 2 weeks old. I don't remember this being the case before and I can't easily see a setting to change this.I'm guessing SOTI is only keeping data for 2 weeks and then wiping it, which seems crazy and so surely I must be able to change a setting somewhere to ask it to store for at least 6 months? Any clarification would be much appreciated.