High traffic from officecdn.microsoft.com

Question

_{Thursday, August 25, 2016 8:54 AM}

High traffic from officecdn.microsoft.com

All replies (4)

_{Friday, August 26, 2016 9:02 AM ✅Answered | 1 vote}

Hi,

So you have observed huge traffic coming from officecdn.microsoft.com. Do you have click-to-run version of Office running on your computer?

If you are using a click-to-run version of Office, Office update service runs as a scheduled task daily to check the Office 365 service, http://officecdn.microsoft.com/ for new updates.

When the latest update is available, Office will schedule a time randomly over the next few days to download and install the update. That's probably why you saw a high traffic from this server.

Although the default is to download updates directly from the CDN server, you have the option to configure Office to retrieve updates from a local network share. This can be done via the following policy setting:

http://gpsearch.azurewebsites.net/#12197

Hope this helps. Let me know if this is not your case, feel free to post back with more details, we'll then take a further look.

Regards,

Ethan Hua

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_{Wednesday, January 18, 2017 6:23 AM}

Ethan - thats great, but we've confirmed with detailed firewall logs, TWO users with incoming traffic of approx 310-330GB EACH in the last 7 days to the MS CDN site. Unfathomable. Googling around, others have seen this too.

Is this a download failure retry loop or something? This site is in south america and traffic shaping is only a bandaid, it shouldnt be doing this quantity in the first place. Any Solutions like reinstall or ?

Brian

_{Tuesday, April 10, 2018 2:54 PM}

Is there any way to block this download?

_{Wednesday, July 4, 2018 8:57 AM | 3 votes}

i made a firewall block to *.edgesuite.net/*

this seems to stop the traffic. users were eating all our internet bandwidth….