Troubleshooting issues with container corruption or missing data

Important

An upcoming change to Windows, included in the April 2026 Windows Server update, the default Kerberos encryption type is changing from RC4 to AES-SHA1.

File shares hosting FSLogix containers that aren't upgraded to AES-SHA1 might have access issues after this change is applied. To avoid disruption, complete the upgrade to AES-SHA1 before installing the update.

Customers who have already upgraded to AES-SHA1 aren't affected.

For more information, see the FSLogix blog: Action required: Windows Kerberos hardening (RC4) may affect FSLogix profiles on SMB storage.

Properly configure Anti-virus products with excluded files and folders

Anti-virus products are one of the most common occurrences of container corruption. If an Anti-virus product is scanning or processing data into or out of the container, it can lead to corruption.

Recommendations

Exercise caution when excluding directories using redirections.xml

It can be tempting to exclude data from a profile or ODFC container in order to conserve capacity on the remote storage provider. The folders that make up a user's profile aren't random and should be treated with care. Limiting or exercising restraint when choosing which folders to exclude from a user's profile prevents unexpected results from a misconfigured redirections.xml file.

Recommendations

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