People meet some issues when they attempt to sign in to OneDrive and 0x8004deef error is one of them.
OneDrive Sign-in Error 0x8004deef
What is the OneDrive sign-in error 0x8004deef?
you’re free to use the following tips to fix the web connection issues.
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MiniTool ShadowMaker is afree backup software, available forlocalandNAS backupand synchronization.
Different from the cloud service, you dont need to worry about the connection issue.
like download and plant the program to get a 30-day free trial version.

Step 2: In theSynctab, clickSOURCEto choose what you want to sync.
There are three options User, Computer, and Libraries.
Then in theDESTINATIONsection, you oughta choose where to sync to.

Step 3: ClickSync Nowto start the task immediately orSync Laterto start it later.
The delayed task will be placed in theManagetab.
Step 1: Right-press the time & date section in the taskbar and selectAdjust date/timefrom the menu.

Step 3: Then you’re able to change your date and time and clickChangeto save it.
However, setting it toSet time automaticallyis always recommended.
Besides, you may need to power cycle your PC to apply the parameters.

This can help fix the error 0x8004deef.
In case you accidentally delete other important entries and registries, we highly recommend you back up the registry.
These related articles can be helpful for you:
Step 1: OpenRunby pressingWin + Rand typeregeditto hitEnter.

Step 2: Copy and paste this address in the path bar and pressEnterto locate it.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\Identity
Step 3: Then right-click onIdentityfrom the left panel to chooseDeleteto remove the registry.
Fix 5: Disable Proxy
Proxy can disguise your devicesIP addressand that may affect the OneDrive sign-in.
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you might have a go at kill the connection and peek if the error is fixed.
Step 1: OpenSettingsby pressingWin + Iand go toNetwork & Internet.
Step 2: In theProxytab, turn off theAutomatically detect settingsoption.

Step 3: Scroll down to theManual proxy setupand suspend the option ofUse a proxy server.
you could find some methods to fix it.
Besides, reinstalling OneDrive is what you might try for troubleshooting.
Step 1: Open theRundialog box and copy and paste this command.
%localappdata%\Microsoft\OneDrive\onedrive.exe /reset
Step 2: HitEnterto initiate the reset process.
This process can restore OneDrive to its default tweaks and re-sync your files.
Unable to sign in to your OneDrive account?
There are six methods issued in this post and you may find the suitable one from above for troubleshooting.