Microsoft 365 services timing out

[munrobasher]

This is a bit of a background kind of question. I've got a VM 200Mbps connection at home and it's rock solid and fast. Zero complaints. I've worked from home as IT specialist for six years. Everything fine except recently I'm getting performance issues with Microsoft 365 services, specifically the various admin consoles. Not just for one tenant/domain either - I support several companies and it's occurring with them all. 

Now of course my initial thoughts is that the M365 servers are overloaded. After all, I've occasionally had similar performance problems (pages not rendering) when working at my main clients site where the internet is via M247 and 1Gbps.

But Microsoft are denying any problems and the fact that if I remote into a laptop at this client's site, the same web pages open fine, it does suggest that it's not a problem with their server.

So what else could this be? My internet connection is fine, every other web site and service (like Outlook/Exchange) works flawlessly. Just get errors like this:

Loading chunk 6330 failed. (error: https://prod.msocdn.com/M365/admin-main/2022.4.14.7/inline.en.6330.chunk.js) df32c1e2-9477-4574-af1d-b160789e9f72

My thought is that Virgin Media have had routing problems in the past and when only one service is effected, one's thoughts turned to invisible downstream proxy/caching servers. Not the first time that invisible caching has caused problems with ISPs.

Next time I get problems, I'm going to connect my laptop to my mobile hotspot and try that route.

[Tom_W1]

Hi @munrobasher thanks for your post here inthe community although I'm sorry to hear of your concerns raised.

There aren't any known issues with Microsoft 365 on our network, but I'm happy to explore this further if you're still having problems.

How are things when you use an alternative connection, such as your mobile hotspot as you advised you would try? Have you had chance to try this over the weekend?

Many thanks

[munrobasher]

It's very variable. I've not had reason to access M365 from home over the weekend but will be again tomorrow.

[munrobasher]

Hi Tom,

I've just come to use M365 again this morning and same problems loading pages. Specifically this page today: https://admin.microsoft.com. The page wouldn't load at all first time so had to refresh. It partially loaded but very often the banner didn't show. I've also got a laptop and it too was struggling.

So I turned my (EE) mobile into a hotspot and connected laptop to that - no problems at all. Went through the the 5 clients I manage using M365, every single one loaded no problem. As my laptop does when I'm out of the house.

I've got Wi-Fi on my desktop as well which is what I'm currently using. Every single M365 tenant/admin page loads no problem.

It's only the Microsoft stack that I'm having trouble with and having worked in IT now for 35 years, everything is telling me that it's not my local system. I guess it could be some really weird routing across my wired network. I'll isolate that by plugging into the VM router from the laptop directly and factory reset it. That'll have to wait though.

I still think it's a caching issue downstream that's only effecting Microsoft domains.

Cheers, Rob.

[munrobasher]

Being a some-time programmer and having used the M365 admin consoles a lot, I've got an inkling how architecturally they work. I suspect the background page loads and then a series of asynchronous requests are made via AJAX (or similar) to download the information (chunks) for the separate panels. It's these async requests that appear to be struggling most of the time.

[munrobasher]

Interestingly, it's much better today. Nothing at all changed at my end. Just loaded three M365 admin screens for different clients and all loaded quickly.

[plynch66 · Accepted solution]

Hi,

I just want to say that you aren't alone in experiencing this problem. I work with both Azure and O365 and using the Office Apps (especially Outlook and Teams) via a browser and has been near impossible for the last week or so.

Regards,

Paul 

[munrobasher]

Hi Paul - thanks for the comment and appreciated. I was starting to question my sanity! I mean Virgin Media and Azure/M365 aren't exactly infrequently used combinations but Google wasn't showing up much at all.

[munrobasher]

Please to report that whatever the problems were downstream with Virgin Media and Microsoft services app that they appear to have been fixed. Been in and out of M365 all day and not one problem.

[plynch66]

Hi,

Yep, same here. They have clearly resolved the root cause of the network issue because my download speed problem appears to have been resolved as well - it's gone from 448Mbps back up to 1144mbps this afternoon.

https://community.virginmedia.com/t5/Speed/Gig1-Speed-Issue/td-p/4999092

Paul