offline error

Question

offline error

Tom Green 55

My Outlook icon in the tray has an exclamation mark, and best I can tell Outlook thinks I'm offline but I'm not

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2 answers

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Answer 1

Welcome to Microsoft Q&A!

Hello,

What you are experiencing is currently linked to an active Microsoft 365 service incident tracked under ID EX1550543.

Microsoft initially reported intermittent connectivity issues affecting Exchange Online mailboxes in the Americas, and has since updated the advisory to confirm that the issue may impact general Microsoft 365 service connectivity across any region.

What this means for your environment:

Affected Services: Primarily Exchange Online / Outlook (desktop client, Outlook on the web, and mobile apps), along with potential authentication or connection timeouts across broader Microsoft 365 services (such as Teams, SharePoint/OneDrive, or the Microsoft 365 Admin Center) that rely on shared front-end connectivity infrastructure.

Action Required: No configuration changes are needed on your tenant or client devices. Microsoft engineering teams are actively working on mitigation.

How to track live status:

Open the Microsoft 365 Admin Center using a Global Admin or Service Support Admin account.

Navigate to Health > Service health.

Search for incident ID EX1550543 for real-time mitigation progress and root cause updates.(You can also follow official updates via @MSFT365Status on X).

Help make this community better for everyone: if this answer resolved your issue, please accept it or leave an upvote.

Answer 2

In classic Outlook, select Send/Receive > Work Offline once; the button should become unshaded and Working Offline should disappear from the status bar.^1^

If it remains offline

Check the exact status at the bottom of Outlook
- Working Offline: select Send/Receive > Work Offline again until the status changes.
- Disconnected or Trying to connect: Outlook cannot reach the mail server, so continue below.^2^
Test the mailbox through webmail
- Sign in to your email through its website and send yourself a test message.
- If webmail also fails, the problem is with the account or mail service; contact the email provider.
- If webmail works, the issue is isolated to classic Outlook or the computer.^1^
If the Work Offline button is missing
- For a Microsoft 365 or Exchange account, this can occur when Cached Exchange Mode is disabled. Enable Cached Exchange Mode, or contact the person who manages the Exchange server.^1^
- If the entire command disappeared because the ribbon was customized, right-click the ribbon, select Customize the Ribbon, select Send/Receive under the main tabs, and choose Reset.^3^
Install pending Office and Windows updates, then restart Outlook. Microsoft lists updates as a reconnect step for classic Outlook.^1^

Test add-ins

Close Outlook.
Press Windows key+R.
Enter outlook.exe /safe and select OK.
If Outlook connects in Safe Mode:
- Open File > Options > Add-ins.
- At Manage: COM Add-ins, select Go.
- Clear the add-in checkboxes—do not remove the add-ins.
- Restart Outlook normally, then re-enable them individually until the problem returns.^4^

If Outlook still shows Disconnected

Create a test profile:

Close Outlook.
Open Control Panel > Mail (Microsoft Outlook) > Show Profiles.
Select Add, name the profile, and add the email account.
Start Outlook while holding Shift, select the new profile, and test sending and receiving.

If the new profile connects, the original profile is damaged; continue using the new profile after confirming that all required accounts and locally stored data are available. If the new profile is also disconnected while webmail works, contact the email provider or—on a managed Microsoft 365 account—your organization’s administrator.^4^

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