- Software and digital services
- Office suites
0x8004DEB4
Microsoft 365 0x8004DEB4 in OneDrive: work account sign-in failure
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
OneDrive will not sign in with your work or school account and shows 0x8004deb4. Microsoft documents it after an Office update on Windows 10. Update Office and Windows and, if it continues, tell IT.
Safety first
Stop and check this first
- Do not edit the registry by hand on your PC: Microsoft warns that a wrong change causes serious problems, and the workaround is deployed by policy from IT.
Safe checks you can perform
- When it started and with which account
- Office and Windows up to date
- Report to IT support
Leave these tasks to a qualified professional
- Do not attempt this professional task: Temporary registry value via Group Policy
- Do not attempt this professional task: Review the AAD Operational log
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Temporary registry value via Group Policy
What they doThe admin deploys by Group Policy, at user sign-in, the value EnableADAL=dword:00000002 under HKEY_CURRENT_USER\SOFTWARE\Microsoft\OneDrive, after backing up the registry.
They must show youthe policy applied.
In writingdate added and the commitment to remove it.
Review the AAD Operational log
What they doThe technician reviews sign-in errors in Event Viewer, AAD, Operational, and updates Office to a build with ADAL 1.2.3 or later to collect logs if the case goes to support.
They must show youthe error entries and the Office version.
In writingthe result after updating.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
When it started and with which account
- Who:
- you.
- How:
- note whether the error appeared after an Office update and whether it happens with your work or school account.
- Result that matters:
- knowing whether it matches the case Microsoft describes.
- If it matches:
- it is the documented case; continue with updates and tell IT.
- If it is a personal account:
- tell IT, because the article covers work accounts.
- Evidence to keep:
- date of the last Office update and account affected.
Evidence: Error Code 0x8004deb4 when signing in to OneDrive
Office and Windows up to date
- Who:
- you, or IT on a managed device.
- How:
- install the available Office and Windows updates and sign in to OneDrive again.
- Result that matters:
- whether the error goes away on current versions.
- If it does:
- the earlier build caused the authentication failure.
- If not:
- hand the case to IT with the code.
- Evidence to keep:
- Office and Windows version after updating.
Evidence: Connection issues when signing in after updating to Office 2016 build 16.0.7967 on Windows 10 · Error Code 0x8004deb4 when signing in to OneDrive
Report to IT support
- Who:
- you.
- How:
- send IT the full message with code 0x8004deb4, the time and the Office version.
- Result that matters:
- IT being able to apply the workaround or collect logs.
- If IT applies the workaround:
- check OneDrive signs in.
- If not:
- IT opens a support request with logs.
- Evidence to keep:
- screenshot of the error message.
Evidence: Error Code 0x8004deb4 when signing in to OneDrive
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Software and digital services
- Brand
- Microsoft 365
- Product type
- Office suites
Known code variants
- 0x8004deb4
- 8004deb4
- OneDrive 0x8004deb4
What it means
Microsoft documents 0x8004deb4 when signing in to OneDrive with a work or school account on Windows 10, after updating to Office 2016 build 16.0.7967 or later, when Office switches to Web Account Manager (WAM). The published workaround is a registry value the admin deploys by Group Policy, which Microsoft says to remove once a fix ships. The code does not say which part of sign-in fails.
Warnings and stop conditions
- Mediumsource verified
Do not edit the registry by hand on your PC: Microsoft warns that a wrong change causes serious problems, and the workaround is deployed by policy from IT.
Evidence: Error Code 0x8004deb4 when signing in to OneDrive
Symptoms and causes
Probable causes · in order
- Authentication change after an Office updateCommon
It started after an Office update on Windows 10 and affects the work or school account.
Evidence: Connection issues when signing in after updating to Office 2016 build 16.0.7967 on Windows 10 · Error Code 0x8004deb4 when signing in to OneDrive
- Outdated Office or Windows buildPossible
Microsoft recommends the latest build for the channel and Windows 10 version 22H2 for authentication issues.
Evidence: Connection issues when signing in after updating to Office 2016 build 16.0.7967 on Windows 10
Virtual technician
Does 0x8004DEB4 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Connection issues when signing in after updating to Office 2016 build 16.0.7967 on Windows 10
Microsoft · 2025 · official_doc
- 2
Error Code 0x8004deb4 when signing in to OneDrive
Microsoft · 2026 · official_doc
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