Tell us the account you want to use to open _vti_rpc.

Fixed now it seems. System just said an Office Update was available. After it was installed, cannot reproduce the problem.

Hello Gareez,

I just did an Online Repair as well and this did not resolve the issue, would you mind sharing what you did exactly to resolve this issue?

Regards,

Jaap Brasser

Did, as directed from the "German" case doc'd with MS.  Did a repair operation on Office and it's taken care of issue.  Relieved, indeed.  What a hindrance!

REVISION!

DIDN'T REPAIR .. STILL EVIDENT.  REPAIR of Office, DIDN'T FIX !!

Note: I also saw this on open of a document that I just saved to OneDrive (via downloading from Thunderbird into my local OneDrive account) and opened by double-clicking on it from the Explorer window.

1. It happens the first time I open a file when I try to close it. I have seen it with both Excel and Word. Once I close the file (which saves successfully even though I always X out of the auth prompt), I don't see the prompt for that file again. It does not happen with new files, only files that were saved to OneDrive before August.
2. I have Office 365 subscription and updates are downloaded and installed automatically; I'm fully updated.
3. Yes, I am signed into Office with the same account as I sign into OneDrive, which is also signed in on my computer.
4. Yes. On this computer, this is the only account that I have ever signed in with. I recently rebuilt the computer (after I quit the job that had a different Office account).

I am on Windows 7 x64, with 32-bit Office installed (the default).

Note that if this were a real auth prompt, it wouldn't list the server as _vti_rpc, which is not a server that would have my OneDrive documents on it.