For G Suite.
For Office 365.
When is the starting point of the retention period of HDE Email Archive?
The start point of the mail archive retention period is to be when the mail reaches the archive service
When the mail archive retention period of your agreement is 1 year, the details are as follows;
It differs depending on the mail.
archive expiration date
Deletion of the expired mail archive data is done through monthly batch processing at once on one certain day of each month. So, there may be cases that Mail archive search result shows some retention expired mails depending on the archive search timing.