From c423da08a0de11ec3deb4c146351ac4211ce5775 Mon Sep 17 00:00:00 2001 From: MishraSoumyaMS <78144677+MishraSoumyaMS@users.noreply.github.com> Date: Mon, 11 Aug 2025 21:29:41 +0530 Subject: [PATCH] Update submissions-admin.md --- defender-office-365/submissions-admin.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/defender-office-365/submissions-admin.md b/defender-office-365/submissions-admin.md index 6da41b765f..57743450a0 100644 --- a/defender-office-365/submissions-admin.md +++ b/defender-office-365/submissions-admin.md @@ -140,6 +140,9 @@ For other ways that **admins** can report messages to Microsoft in the Defender After a few moments, the block entry is available on the **Domains & addresses** tab on the **Tenant Allow/Block Lists** page at . +> [!NOTE] +> Admin submissions for on-premises mailboxes are only supported for messages that are less than 7 days old. Additionally, uploading email files for admin submissions is not currently supported for on-premises mailboxes. + ### Report questionable email attachments to Microsoft 1. In the Microsoft Defender portal at , go to **Actions & submissions** \> **Submissions**. Or, to go directly to the **Submissions** page, use .