The Tenant Allow/Block Listsupports more entries in each category (Domains & email addresses, Files, and URLs):

The Tenant Allow/Block Listsupports more entries in each category (Domains & email addresses, Files, and URLs):

  • Microsoft Defender for Office 365 Plan 2 supports 10,000 block entries and 5,000 allow entries (via admin submissions) in each category.
  • Microsoft Defender for Office 365 Plan 1 supports 1,000 block entries and 1,000 allow entries (via admin submissions) in each category.
  • Default protection in Microsoft 365 remains at 500 block entries and 500 allow entries (via admin submissions) in each category.