Outlook Disconnecting, won't reconnect until rebooted

Anonymous
2022-07-21T10:07:28+00:00

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:

  • Recreating mail profile
  • Disabling cached exchange mode
  • Wiping and re-installing Windows 10 & Office 365

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

Outlook | Windows | Classic Outlook for Windows | For home

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Anonymous
2022-09-20T14:24:05+00:00

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

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  1. Anonymous
    2022-09-12T14:14:04+00:00

    Hello,

    We are also experiencing the same issues at one of our companies.

    But it's mainly Windows 11 and they are also losing connection to OneDrive so they can't save in Excel or Word because it's trying to connect to OneDrive.

    Seems that some days it works and other days our users have to reboot 4-5 times.

    I have tried everything that you have except re-installing Windows.

    Have you found anything that works?

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  2. Anonymous
    2022-08-31T21:13:11+00:00

    We are also experiencing the same issue. It started in July for one user and now impacts five users as of August.

    We've tried:

    • Office 365 Online/Full Repair
    • Office 365 Semi-annual and Monthly channel
    • Windows 10 Feature Update to latest
    • Outlook Profile Rebuild
    • AAD Broker Plugin Rebuild
    • Windows User Profile Rebuild
    • Cisco Meraki Balanced vs. Security
    • Cisco Meraki IDS instead of IPS

    Temporary fix:

    • Reboot or log off resolves the issue for a few hours

    Update:

    • Uninstalling Dell Optimizer/ExpressConnect service did resolve this issue for Dell laptops.

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  3. Anonymous
    2022-07-21T13:15:53+00:00

    Hello Jamie Penistone

    Good day! Thank you for posting to Microsoft Community. We are happy to help you.

    Regarding your post, as many users facing this query, so suggest you to check with one of the affected users to check with scan Outlook with SARA tool by follow the steps mention in Scan by using Microsoft Support and Recovery Assistant - Outlook | Microsoft Docs. The Microsoft Support and Recovery Assistant (SaRA) uses advanced diagnostics to report known problems and details about your Microsoft Outlook configuration. Additional choose Outlook from SARA tool and select Outlook keeps saying "Trying to connect..." or "Disconnected" option and check the result. To learn about SARA tool, kinldy check details from About the Microsoft Support and Recovery Assistant.

    For testing purpose, ask one of the affected user to configure his Outlook in different system with different network (not belongs to your organization’s system) and check if it makes any difference.

    Further during search, found one of the know issue with connectivity, so kinldy check details from Internet connectivity issues in M365 apps after a change to the IP address range (microsoft.com) to see if it match with your situation.

    Thank you so much for your precious time and cooperation. Stay safe and healthy.

    Sincerely,

    Ankita Vaidya | Microsoft Community Moderator

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