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.Scott supported this idea ·Scott commented
I can help with the above, as we are facing the issue with SharePoint Online and OneDrive for Business. We have a legal requirement (we are a legal firm) to hold Audit data for an unlimited period of time.
We have no issue in this being counted against our storage within the tenant, but to resolve this we are having to look at costly third party solutions to export the logs using an API and hold them in an on-premise SQL DB.
It would be much easier if you provided a choice - 90 days standard at no cost, and above 90 days will have a cost against your tenant storage allocation - which would be fine by us!
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