After 90 days of Phase 2, change the policy to "Hard Block Open" . Any remaining legacy files become inaccessible. You will get three angry emails, but the migration will be over.
Here is the proper information regarding this feature, where to find it, and how to use it.
If you want to finally kill .doc in your organization, do not flip the "Hard Block" switch tomorrow. That is a riot waiting to happen. Use a 3-phase strategy: file block settings in the trust center
They allow you to say: "I will never touch a Word 6.0 document again. Please treat it as a potential bomb."
The primary security objective is . Older file formats often lack the modern security features found in XML-based formats (like .docx or .xlsx). Malicious actors frequently exploit vulnerabilities in legacy formats to execute arbitrary code. Organizations often use Group Policy Objects (GPO) to enforce these blocks across an enterprise, ensuring a consistent security baseline. 4. Configuration and Troubleshooting After 90 days of Phase 2, change the
The actual error depends on the Office version, but the fix is always the same: The IT admin must either unblock that file type globally, or the user must use a third-party tool to convert the file to a modern format.
Exploring "File Block Settings" in the Microsoft Office Trust Center Here is the proper information regarding this feature,
Use File Block Settings to enforce your file format policy , not to fix a one-off error. If a user complains they cannot open a .prn file from 1992, do not globally unblock .prn . Convert the file for them. Your security posture is only as strong as your oldest allowed file format.
For every file type on that list, you have two distinct checkboxes: