wiki: add guide for backing up UL student email in Outlook

src/support/backup.md

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+# UL Student Account Email Backup in Outlook
+
+After you graduate, your UL student email account will be deactivated.
+There's a decent chance that you'll need access to the emails in that account at some point in the future,
+so it's a good idea to back them up before you lose access.
+
+We recommend exporting your emails before your account is deactivated, which happens shortly after graduation (
+approximately 6 months).
+You can export your emails from Outlook, which is the official email client for UL student accounts.
+
+Outlook has two modes, New Outlook and Classic Outlook.
+As of the time of writing, New Outlook does not support exporting emails, so you will need to use Classic Outlook to
+back up your emails.
+If you already use Classic Outlook, you can skip the following section and go straight
+to [Steps to back up Your UL Student Email][0].
+
+## Switching to Classic Outlook
+
+1. **Open Outlook**:
+   Launch the Outlook application on your computer.
+2. **Access the ``Help`` Tab**:
+   Click on the ``Help`` tab in the top left taskbar.
+   ![Outlook Help Bar][1]
+3. **Switch to Classic Outlook**:
+   In the ``Help`` tab, click on "``Switch to Classic Outlook``".
+4. **Confirm the Switch**:
+   If prompted, confirm that you want to switch to Classic Outlook by clicking ``Skip Feedback``.
+   ![Switch to Classic Outlook][2]
+5. **Done!**:
+   Outlook will close, and then reopen in Classic mode.
+
+## Steps to back up Your UL Student Email
+
+1. **Log in to your UL Student Email**:
+   Open up Outlook or your preferred email client and log in to your UL student email account.
+2. **Access the File Menu**:
+   Click on the "``File``" tab in the top left corner of Outlook.
+   ![File Menu][3]
+3. **Access Open * Export**:
+   In the left sidebar, click on "``Open & Export``".
+   ![Open & Export][4]
+4. **Export to a File**:
+   Click on "``Import/Export``" to open the Import and Export Wizard.
+   ![Import/Export Wizard][5]
+5. **Choose Export to a File**:
+   Select "``Export to a file``" and click "``Next``".
+6. **Select File Type**:
+   Choose "``Outlook Data File (.pst)``" and click "``Next``".
+
+   ![Export to Outlook Data File][6]
+7. **Select the Folder to Export**:
+   Choose the folder you want to back up (e.g., "``Inbox``") and ensure "``Include subfolders``" is checked.
+   Click "``Next``"
+
+   ![Select Folder to Export][7]
+8. **Choose the Destination**:
+   Click "``Browse``" to select where you want to save the exported file.
+   Choose a location on your computer and give the file a name (e.g., "UL_Student_Email_Backup.pst").
+   Click "``Finish``".
+
+   ![Choose Destination][8]
+9. **Set a Password (Optional)**:
+   You can set a password for the PST file if you want to protect it.
+   If you don't want to set a password, just click "``OK``".
+
+   ![Set Password][9]
+10. **Backup Complete**:
+    Your UL student email will now be backed up to the specified file.
+    You can access this file later using Outlook or import it into another email client.
+
+[0]: #steps-to-back-up-your-ul-student-email
+[1]: ./backup/backup_1.png
+[2]: ./backup/backup_2.png
+[3]: ./backup/backup_3.png
+[4]: ./backup/backup_4.png
+[5]: ./backup/backup_5.png
+[6]: ./backup/backup_6.png
+[7]: ./backup/backup_7.png
+[8]: ./backup/backup_8.png
+[9]: ./backup/backup_9.png