Solution 3: Custom archival solution to export emails or any activities from Dataverse into Azure storage.
Regarding Solution 1 Export/Import:
Yes, you can import it. CSV and all the data will be preserved except the 'Modified On'. You can from the images below that I exported a sample email with multiple To lists, CC, BCC and Regarding. Saved the Excel file into . CSV and imported it back. Note: You can see that 'Modified On' is updated to the date time that your import is done. If you want to preserve the original 'Modified On', you'd need to handle it separately, check this link for that: https://blog.magnetismsolutions.com/blog/nickchin/2019/11/27/dynamics-365-data-migration---how-to-keep-the-original-modified-on-date/
1. Exporting this sample email
2. Save As into . CSV and importing it
3. Successfully imported but the 'Modified On is change'. Use the provided approach to preserve it.
Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.