You can follow below steps to archive all emails you received in last year in Outlook.

1. In the Mail view, press the Ctrl + E keys simultaneous to activate the Search Tools, and then click Search > This Week > Last Year. See screenshot:

Note: If necessary, you can change the search scope in the Scope group on the Search tab.

2. Now all emails received in last year are found out and listed in the mail list. Select all of search results, right click and select Move > Other Folder from the context menu. See screenshot:

Note: You can select all emails in the mail list with selecting any email and pressing Ctrl + A keys simultaneously.

3. Now in the Move Items dialog box, please click the New button. See screenshot below:

4. In the Create New Folder dialog box, please type a name for the new folder in the Name box, click an email account name in the Select where to place the folder box, and finial click the OK buttons to close both dialog boxes. See screenshot above:

Now all search results are moved to the new mail folder.

5. Click File > Info > Tools > Clean Up Old Items (or File > Info > Cleanup Tools > Archive). See screenshot:

6. Now the Archive dialog box comes out. Please do as below screenshot shown:

(1) Check the Archive this folder and all subfolders option;
(2) Select the new folder you moved all search results in just now in the below list box;
(3) Type Tomorrow in the Archive items older than box;
(4) Click the Browse button to specify save location and file name for the archive file;
(5) Click the OK button.

7. Now a warning dialog box comes out and reminds you it will archive all items in the selected folder. Please click the Yes button to go ahead.

Now all emails in the selected folder are archived. In other words, all emails received in last year are archived.

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