However, problems might happen occasionally.
You may get an error code 0xCAA70010 when trying to sign into Office 365.
This issue can be triggered by connectivity, improper login entry, server problems, and more.
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Here are four solutions to help you take a stab at fix this problem.
you might go through the tutorial and try them one by one.
Do you know what to do when you encounter the Microsoft Word has stopped working error?

This post helps you find answers.
If not, you might move on to the next method.
Step 1: PressWin + Rto fire up the Run window.

you gotta rename the newly created subkey toEnableADAL.
Step 5: Double-click onEnableADALto set the Value data to0and clickOKto save the change.
After clearing, you could save new credentials to see whether you could sign in successfully.

Step 1: TypeControl Panelinto the Windows search bar and hitEnterto open it.
Step 2: ChooseLarge iconsfrom the dropdown menu of theView byand chooseCredential Manager.
Step 3: SelectWindows Credentials, then scroll down to theGeneric Credentialssection.
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you’re gonna wanna find and click theMicrosoft 365 credentialsfrom the list and chooseRemove.
Step 4: ClickYesto confirm.
Step 2: Typeappwiz.cpland hitEnterto fire up the Programs and Features window.
Step 3: Look through the list to findMicrosoft 365. you’re able to right-punch it and chooseChange.
Step 4: ChooseOnline Repairand clickRepairto start the process.
If the problem reappears, you’re free to reinstall the Office 365 app from the official website.
Read this post to know specific information:Microsoft/Office 365 Download/Install/Reinstall on Win 10/11.
In these cases, except to fix the software problem, you must consider the security of your data.
If your files are deleted or lost due to program issues, dont panic.
you might run MiniTool Power Data Recovery to recover files.
Bottom Line
You may get the error code 0xCAA70010 for several reasons.
Try the above methods one by one to find one that works for your situation.