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

Same thing is happening to me with office 365 and I'm doing the same thing, just clicking the x, no need to downgrade, but it is annoying and I thought initially I had a virus that was trying to contact a subroutine or something like that, so I really worried.

I just wish the get rid of that and fix the problem that seems to be all over the place, instead of requesting the same information over and over from each user that reports it.

Having the same problem, not only in Word, but also in Excel and PowerPoint files of which stored in OneDrive. Even with the latest Insider build upgraded (1709, 8509.2001), the issue still existed.

Windows 10 build 1703.16251 fresh install, then O365 installed. This issue occurred in O365 slow and fast ring.

Today, it happens again.

Same problem.

Only started in the last week or so for me.

Office 2016, W10 Pro

Auto-updates ON

Any response from MS yet?

Same problem here in Win10 Pro. Tried reinstalling O365 and deleting credentials, but no luck.

I had the same issue. Thought it was a larger software/environment issue and ended up doing a full reinstall of Windows 10 since I was having a few other issues (major Office 2016 crashes even after going through the Office Repair process). But, after reinstalling both Windows 10 and Office 2016 the error persisted.

Strangely, I have not seen the error in the last two days. I'm not sure what is different.

Only thing that I have done is that when the "sign in" window popped up, both in Word and in Excel, I "logged in" multiple times (probably like 3-5 times each). One time, the prompt stopped and I was able to close normally. Other times I got tired and just closed the window.

The only thing I can really figure is that the backend OneDrive issue is slowly being fixed on a gradual rollout.

My Version of Office is at 1707 Build 8326.2076