At this point, the Office 365 service only allows for the retention of audit entries for 90 days. Can you provide us more information regarding your requirement to keep logs for 3 years. Is this a legal obligation? Please provide details around the specific audit entries you would like to retain for an extended period of time.Fabrizio Alberti commented
It looks like a joke. After about 3 years, still in "Tell us more"? Gdpr and some regulations require at least 180 days and still 90 days. Microsoft must become more reactive in some circumstances like this and provide for each type of license what the laws provide.