Forum Discussion
Trouble identifying cause for network problems
Hi there, we have a quite simple setup, but a lot of problems we can't solve ourselves. We have a brand new M365 tenant, created in march. So far, there are 5 users created - two with E5, the ot...
PaulAndrew
Microsoft
MicrosoftEikeKortz381 If the test you are using is from https://connectivity.office.com and it's reporting that URLs in Office 365 are blocked, you would expect all sorts of problems using Office 365. You will need to unblock those URLs as the next step before further troubleshooting.
Paul
Hi PaulAndrew , yes, that is exactly what I am using and talking about (sorry, I could have mentioned that in my initial post).
But, where do I block/unblock these? In Defender? The block-lists there are empty. Why would a new fresh tenant even block its own product's URLs.
- PaulAndrewEikeKortz381 This isn't likely any Microsoft software blocking these and it's not likely part of your Microsoft 365 tenant. Does your network have network perimeter firewalls, proxy servers, cloud access security brokers, or do you have a network security team? Those are all possibilities that you would need to investigate. You can run the conectivity.office.com test from other network locations to narrow down the issue. Try running it from home, from a coffee shop, from other machines to find where the network filtering is occurring.
Paul
