Like a lot of people, I've been working from home for weeks due to Covid-19. Prior to that I would periodically work from home (work from home day, evening, weekend, etc.). I'm also an IT Professional.
Starting yesterday, April 28th, 2020, I can no longer access Microsoft Office 365 Sharepoint Online via my comcast Internet connection. If I switch my computer to my AT&T iPhone hotspot, it works fine. Prior to yesterday I never had any issues. Also I have two computers and the issue is on both: MACBook Pro running Catalina and a Windows 10 computer. The issue started at the same time for both computers.
On Teams Files, I get this message:
xxxxxxxx-my.sharepoint.com unexpectedly closed the connection.
This also includes access to O365 Teams "files" and OneDrive, which of course are both on Sharepoint Online.
Tried the usual stuff - rebooted both computers, rebooted router, etc...
So far this isn't an issue others at my company reported, but I think there are very few of us (possibly only me) work in the South Bay (South San Jose).
Solved! Go to Solution.
What does a Ping , Traceroute or DNS Lookup tell you about the connection? There have been recurring instances of connectivity issues with Microsoft related sites and Comcast of late due to errors with Microsoft's edge servers going down.
Try disabling the Xfi Advanced Security feature as a work-around for now and see. It's buggy ! And there is currently no way for an end-user to be able to whitelist anything;
Great suggestion, can't believe I didn't try it. This solved the issue.
That said, I'm not thrilled about and rely on that feature to protect my kid's devices in case they make any poor choices on the Internet.
Also this is a new issue that for me only started yesterday and I've had the advanced threat protection turned on for some time. So Comcast is identifying sharepoint online as a false positive. @comcast - I hope you fix this.
Glad that worked for you !