Hi @Handian Sudianto,
When we apply online archive for 1 year period like below pic, are this mean all emails in the inbox will kept for last 1 year and move all emails more than 1 year to archive?
Yes. This retention tag will move messages more than 1 year old to archive.
How if i want to archive email before 2024, are this is possible?
If you mean you would like all emails before 2024 to be archived, it may not be possible with retention policy as it is based on the retention age rather than a certain time period.
For how the retention age is calculated please refer to this link:
How retention age is calculated in Exchange Online
For example if your retention tag action is to archive emails which reach 1 year old, emails created or received before 1/9/2023 will all be moved to archive, while emails after 1/9/2023 will be moved once they reach 1 year old.
(1/10/2023 emails will be moved on 1/10/2024...)
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