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Written by Brad

Categories: Exchange Online

May 17, 2022

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Migrating the Safe Links Block List to Tenant Allow Block List

Exchange Online, SharePoint Development Services, Microsoft 365 Experts

From Microsoft Corporation
Technical Bulletin MC373880 · Published May 4, 2022

Message Summary

Beginning in June organizations will no longer have the ability to add to the Safe Links Block List in the Global Setting menu. Following this, we will attempt to migrate the Safe Links Block List to the Tenant Allow Block List (TABL) on behalf of the organization. For any entries that we are unable to migrate, they will be marked as such in the Block List and organizations will have the ability to take action as needed.

When this will happen:

  • Early June: Organizations will no longer have the ability to add to the URL/Domain entries to the Safe Links Block List in the Global Settings flyout and we will attempt to migrate all the entries in an organization’s Safe Links Block List to TABL on their behalf
  • Mid-June through November: Organizations will have the ability review entries that were not able to be migrated and resolve the issue(s)
  • December: The Safe Links Block List will be retired

How this will affect your organization:

Organizations who are utilizing the Safe Links Block List will need to review the list to ensure all entries were migrated successfully. Any entries that are unable to be migrated will be marked as such and organizations will have the ability to resolve that entry, at which point migration will run again.

Organizations will use the Tenant Allow Block List to manage URL/Domain blocks moving forward.

What you need to do to prepare:

In June an update to this Message center post will be sent notifying organizations that the first migration has been completed and they will need to review their Safe Links Block Lists for potential actions.

TECHNICAL BULLETIN END

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