Sign-in errors are very common in most applications, OneDrive is no exception.
Without further delay, let’s dive right into it!
Sometimes, when you are trying to launch OneDrive, you might be prompted by error code 0x8004da9a.

Fix 2: Update OneDrive to the Latest Version
Step 1.
Launch OneDrive and press thegear iconat the top-right corner.
Go toSettings>About> the version link underAbout Microsoft OneDriveto kick off the Microsoft Support page.

Click onDownload OneDrive for Windowsif any new version is available.
In this case, you gotta clear OneDrive cache.
Step 2. bang out the following command and hitEnter.
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%localappdata%\Microsoft\OneDrive\onedrive.exe /reset
Step 3. cycle your rig and relaunch OneDrive to see if error 0x8004da9a disappears.
Heres how to repair your Office:
Step 1.
Typeappwiz.cpland hitEnterto launchPrograms and Features.
Now, you’re free to see all the applications and programs installed on your rig.
Find Microsoft Office, hit it and click onChange.
If OneDrive error code 0x8004da9a after the completion, run theOnline Repairtool.
Fix 5: Reinstall OneDrive
The last resort is to reinstall this program on your setup.
Heres how to do it:
Move 1: Uninstall OneDrive
Step 1.
RunCommand Promptas an administrator.
In the command window, pop in the following command and hitEnterto quit the OneDrive process.
taskkill /f /im OneDrive.exe
Step 3.
Copy & paste the following command and dont forget to hitEnter.
After the process is done, close Command Prompt.
Move 2: Rename the OneDrive Folder
Step 1.
PressWin+Eto openFile Explorerand open your profile folder (C: \User%Username%).
Double-tap on the OneDrive folder and rename it asOneDrive.OLD.
Move 3: Download and Install OneDrive
Step 1.
Go to theofficial Microsoft webpageto download OneDrive.
After downloading, hit theOneDriveicon and follow the installation wizard to install it on your system.
Sign in to your account and then move all your files from theOneDrive.OLDfolder to theOneDrivefolder.
Is your OneDrive not merging file changes on Windows 10/11?
How to fix this sync conflict issue?
Try the solutions in this post!
Final Words
Now, you must remove OneDrive error 0x8004da9a from your machine.
Which method works for you?
We are looking forward to receiving your good news!