Delegate mailbox access

I need to give my assistant, Lina Morales, full access to my mailbox and send her a note explaining the handoff. Grant her full read/write access and the ability to send on my behalf, then send Lina an email summarizing what she can and cannot delete, where to find my flagged items, and ask her to confirm by Wednesday morning. Check the permission settings first to avoid duplicates.

Before I give Lina full mailbox access, make the request easy for IT and for her to accept. Put the exact permission names up top (Full Access, Send As), show the business reason and the dates (start June 22, trial four weeks), list three likely reviewer hesitations (privacy of tax messages, active litigation folder, calendar invites), and offer the mitigation I will accept for each.

IT says they've applied Full Access to Lina Morales for my mailbox, and I approved it without confirming scope. I'm worried she might see payroll and privileged legal threads I intended to keep private. I can't unpick the change without IT's audit log. Tell me the most likely gap in their implementation and the safest immediate step I should take to contain exposure and verify access.

Every time I hand mailbox access to a direct report we end up fixing overexposed folders, clarifying authority, and sending apology emails. Where am I losing control — is it the pre-handoff checklist, how I label sensitive threads, or how permissions are requested — and what one habit change would stop these fires forever?