This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Starting a few months ago some of our users are reporting that Outlook and Teams disconnect multiple times throughout the day. The only way to fix it is to reboot the machine. They are using Outook for 365 and connecting to a mailbox in Exchange Online. It started with 2 users but more have reported the issue recently.
During the time Outlook & Teams disconnect they do not loose network or internet connection and can open Outlook and Teams on the web.
So far I have tried:
I have listed below the version of Outlook and Window 10 they are using.
Microsoft® Outlook® for Microsoft 365 MSO (Version 2205 Build 16.0.15225.20348) 64-bit
Windows 10
OS build: 19044.1766
Using Classic Outlook on Windows for personal email, calendar, and contact management
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
Have any of you tried uninstalling Dell Optimizer? Apparently that has worked for some folks in the very recent past. It has not worked for my issue, but ours may be a bad network (our only users having the issue are in one small office). Something to do with it installing ExpressConnect
Hello Everyone,
I have the same issue (Outlook and Teams disconnecting every 2 hours and I need to reboot). I use a Dell laptop
I just uninstall Dell Optimizer. I will let you know.
Thank you
There hasn't been anything useful on this topic from Microsoft in years. I've seen posts about this issue dating back to 2018. I'm only commenting to try to save you a little time. This issue is not isolated to windows 11. I'm still in windows 10 and having the same issue since I have been using outlook.
Ok I understand. Thanks.
This problem is very strange. We have several hundred clients but only around 5-8 users have this problem, that I know of.
Most of them are newly hired, new PCs and Windows 11.
So it ain't old bad configuration.
Going back to Windows 10 seems to worked for us but time will tell.
It's a very odd issue. We a large number of computers as well, but around the same number having the issue. Our are all recently added computers to the domain with all except one computer being Windows 10. I removed the Dell Optimizer off of two computers as suggested above to see if that changes anything.
There hasn't been anything useful on this topic from Microsoft in years. I've seen posts about this issue dating back to 2018. I'm only commenting to try to save you a little time. This issue is not isolated to windows 11. I'm still in windows 10 and having the same issue since I have been using outlook.
Ok I understand. Thanks.
This problem is very strange. We have several hundred clients but only around 5-8 users have this problem, that I know of.
Most of them are newly hired, new PCs and Windows 11.
So it ain't old bad configuration.
Going back to Windows 10 seems to worked for us but time will tell.
There hasn't been anything useful on this topic from Microsoft in years. I've seen posts about this issue dating back to 2018. I'm only commenting to try to save you a little time. This issue is not isolated to windows 11. I'm still in windows 10 and having the same issue since I have been using outlook.