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.

[munrobasher]

Spoke to soon Paul - WFH today and just had the dreaded 😞

Loading chunk 67680 failed. (error: https://prod.msocdn.com/M365/admin-main/2022.4.28.2/inline.en.67680.chunk.js) 9644b519-62cb-403a-9ec6-f409a85ecc81

[DinoParry]

I kept blaming my corporate VPN until I switched off the VPN and nope....M365 apps are extremely slow currently.  Loading Outlook first thing in the morning is a nightmare and I end up using Outlook on the phone (mobile network) in order to start the day.  Using Teams desktop to send screenshots images is no-go too.

Deano

[Travis_M]

Hi @munrobasher

Thank you for your reply

How has your connection been since your last reply? Please do provide us with an update and we can investigate further.

Regards

[munrobasher]

It's been okay. Will keep an eye on it.

[munrobasher]

Sadly same problem back today. Every other website fine, microsoft.com timing out esp. https://admin.microsoft.com/ 😞

[mjpartyboy]

This is a strange one. Where I work, we use Teams every second of our day in my role and via the work VPN when home working and I've never had any issues with any of the M365 suite, both native apps and web apps. This has been the case with VM's 200 service using a Super Hub 2 in modem mode, then VM 200 with a Hub 3 in modem mode and now a Hub 4 in modem mode on the 1 Gig service. In all cases an ASUS AC86U has been the router.

[munrobasher]

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@mjpartyboy wrote:

This is a strange one. 

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It certainly is... I was using my laptop when I got that error. Connected it to my mobile hotspot, worked fine. I'm pretty sure that it's a problem downstream with caching - big ISPs often have hidden caching/proxy servers for HTTP(S) traffic. It could be that from home, I'm hitting a cache server that you don't hit due to different routing/location. All I know is that it only occurs from home - take that laptop anywhere else (like local coffee shop on BT), and it's fine. It's also very variable, i.e. it was fine for a few days.

[plynch66]

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@munrobasher wrote:

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@mjpartyboy wrote:

This is a strange one. 

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It certainly is... I was using my laptop when I got that error. Connected it to my mobile hotspot, worked fine. I'm pretty sure that it's a problem downstream with caching - big ISPs often have hidden caching/proxy servers for HTTP(S) traffic. It could be that from home, I'm hitting a cache server that you don't hit due to different routing/location. All I know is that it only occurs from home - take that laptop anywhere else (like local coffee shop on BT), and it's fine. It's also very variable, i.e. it was fine for a few days.

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I can confirm that using O365 (Outlook, Teams) via a browser is like wading through treacle again this morning. I've tried both Edge and Chrome in Incognito mode which is usually fine but not today it seems. Sigh.....

[munrobasher]

I'm in the SK10 postcode (Stockport area). Are you by chance in the same area?

[munrobasher]

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@plynch66 wrote: I can confirm that using O365 (Outlook, Teams) via a browser is like wading through treacle again this morning

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More evidence that it's web traffic caching? Outlook desktop app is fine and I suspect that doesn't use HTTP. But don't know for sure.