Slow performance on Office365.

Question

Dear Tech Community,&nbsp;&nbsp;In our organiztion we have 35.000 users in our tenant who is experiencing slow performance on Office 365 and portal:&nbsp;The 35.000 users who experience the issues are scattered accross 70 different physical locations throughout Denmark.&nbsp;This performance issues affects the following: *OneNote *Exchange *SharePoint*OneDrive*Teams&nbsp;They experience highly delayed page loading times in the browser and/or timeouts when accessing those services.&nbsp;I can also inform that we have tried changing our public DNS on our network, tested for max connections on public IP, proxy throttling without success&nbsp;To rule out that it is related to out network performance we have also made tests on a vanilla computers without any proxy settings, antivirus, packet scanner on several different mobile (3G/4G) networks, again&nbsp;from different cell providers with the same result, slow performance on Office365.&nbsp;Does anyone have any suggestions on what we could try next? &nbsp;We do have a support case opened with Office365 Support, how can we escalate that?&nbsp;&nbsp;I highly appreciate any help, thank you.&nbsp;Best Regards Mike&nbsp;&nbsp;&nbsp;&nbsp;

john wynne · Answer

Mike, There are many potential reasons for slow performance however practically here is a good place to start your investigations https://support.office.com/en-us/article/network-planning-and-performance-tuning-for-office-365-e5f1228c-da3c-4654-bf16-d163daee8848

jcgonzalezmartin · Answer

Do you have a premier support contract in place? If so, they should help you here quite fast

deleted · Answer

We've had poor performance recently, so we opened a ticket with Microsoft Premier Support.&nbsp; They were able to track down a few of our sites/pages that were putting a heavy load on the SharePoint/SQL servers.&nbsp; Microsoft did some changes on their servers and we're making changes to our pages.&nbsp;One of our tasks is to optimize the views on a large list (60000+ items).&nbsp;&nbsp;On another page, we have list web parts that are doing audience targeting based on a managed metadata column (causing excessive SQL queries).

mike azure larsen · Answer

Thank you John, there is a lot useful info in the article.&nbsp;Best Regards Mike&nbsp;

mike azure larsen · Answer

Sadly not yet. But this case that we need some sort of premier support.

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Slow performance on Office365.

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