Forum Discussion
SharePoint Online Connection Issues
Thanks for you suggestions Juan. We just finished up the network test/evaluation with MS and for the most part everything is Ok. We need more bandwidth (who doesn't) and some of our DNS settings in Europe were not perfect. But overall a pass with no real recommendations.
I am having a very similar issue. Did you ever come to a resolution and see this problem go away. Our sites have 100 Mbps connections and we are never over utilizing them. We thought it could be a DNS issue but when the issue would be occurring on a users machine we would switch their DNS to Google for testing and the problem would still exist. Anything else you have done and gotten to work would be much appreciated. We are using SD-Wan technology at all our sites and I thought that might be the culprit but I cannot narrow anything down on it that would be causing it.
We did finally find the issue that was causing this problem. It was our barracuda, there was a setting that was closing the connection after 9 minutes. Our fix was to let the traffic to Microsoft pass with no filtering. This can be challenging as MS changes these form time to time (mostly adding to them) but that is a different issue LOL. Once this was in place (the bypass) the problem never happened again.
Good luck
Very interesting. We have a Barracuda Web Filter as well but our SD-WAN is supposed to be bypassing the Microsoft traffic from going through there. I am not 100% confident that is happening. Did you bypass the traffic in the Barracuda by IP or by all the domains that Microsoft has? Thanks so much for your quick response.
We ended up using ip's, this is based on MS recommendations. During our testing we turned off the webfilter totally, this removed any doubt where the problem was. It took us what seemed like forever to get our security team in the loop as they only wanted to tell us it was not their issue LOL. We then used wild-card dns entries ( *.sharepoint.com etc.), once we got that working we switched to ip's. The ip's are something that we update/confirm monthly as they change some times.
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