Fixes / Outlook · Checked

Outlook Disconnected in status bar: what it means and how to fix

Short answer

Disconnected in the Outlook status bar means classic Outlook for Windows has lost its connection to your mail server. Nothing can be sent or received until it reconnects. This is not the same as Working Offline, which you turn on yourself. The most likely fix is to close Outlook, delete the MicrosoftOffice16 and MS.Outlook entries in Windows Credential Manager, then reopen Outlook and sign in again.

What this message means

Classic Outlook for Windows (Microsoft 365, 2024, 2021, 2019, 2016) shows its connection state at the bottom right of the window. Disconnected means Outlook tried to reach your mail server (Exchange, Microsoft 365, Outlook.com or IMAP) and failed. You did not choose this. When you choose to go offline, the bar says Working Offline instead. You can still read mail that is already downloaded, but new mail will not arrive and anything you send waits in the Outbox. If Outlook on the web (outlook.office.com or outlook.com) works at the same moment, your account and the server are fine and the problem is on your PC: saved passwords, network, add-ins or the Outlook profile.

Common causes

CauseHow to tell
Expired or corrupted saved sign-in credentialsWebsites and Outlook on the web work fine, you recently changed your password or your organisation enforced MFA, and Outlook may briefly show a password prompt or Need Password before switching to Disconnected.
Work Offline toggled on or stuckOn the Send / Receive tab the Work Offline button looks pressed (shaded). The status bar may flip between Working Offline and Disconnected as you click it.
Network, VPN or proxy blocking the mail serverThe problem starts after you connect or disconnect a VPN, change Wi-Fi, or wake the laptop from sleep. It may only happen on one network (for example, work but not home).
A faulty add-inOutlook connects normally when started with outlook.exe /safe but shows Disconnected again in normal mode.
Damaged Outlook profile or outdated Office buildClearing credentials and restarting do not help, the problem affects only this PC, and Outlook on the web works for the same account.
Server-side mailbox configuration (Exchange admins only)On on-premises Exchange, the status bar alternates between Trying to connect... and Disconnected, and you may also see The Microsoft Exchange Administrator has made a change that requires you quit and restart Outlook. Microsoft traces this to a trailing space in the user's legacyExchangeDN attribute.

How to fix it

1. Toggle Work Offline and restart Outlook

Classic Outlook for Windows (Microsoft 365, 2024, 2021, 2019, 2016)

  1. Open a browser and load any website to confirm the internet works. Then sign in to Outlook on the web (outlook.office.com for work accounts, outlook.com for personal ones) to confirm your mailbox is up.
  2. In Outlook, open the Send / Receive tab and click Work Offline (in the Preferences group at the far right).
  3. Watch the status bar. If it now says Working Offline, click Work Offline again. Repeat until it shows Connected or Connected to: Microsoft Exchange.
  4. If it still says Disconnected, close Outlook fully. Check Task Manager (Ctrl + Shift + Esc) that no OUTLOOK.EXE process is left, then reopen it.

2. Clear saved Outlook credentials in Credential Manager

Windows 10 and Windows 11

  1. Close Outlook completely.
  2. Press the Windows key, type Credential Manager and open it.
  3. Click Windows Credentials.
  4. Under Generic Credentials, expand each entry named MicrosoftOffice16_Data:... or MS.Outlook:... (and any entry with your email address) and click Remove, then Yes.
  5. Reopen Outlook and sign in with your current password (and MFA code if asked). Outlook should switch to Connected within a minute.

3. Reset the network connection and VPN

  1. Disconnect from your VPN completely, or connect to it if your company requires the VPN for mail.
  2. Close Outlook.
  3. Turn Wi-Fi off (or unplug the network cable), wait 10 seconds, then reconnect.
  4. Reopen Outlook. If you use a proxy, try another network (such as a phone hotspot). If Outlook connects there, your network or firewall is blocking the mail server.
  5. To see exactly which server connection is failing, hold Ctrl, right-click the Outlook icon in the notification area by the clock (it may be under the ^ arrow), and choose Connection Status. Check the Status column for each server.

4. Start Outlook in Safe Mode to rule out add-ins

Classic Outlook for Windows

  1. Close Outlook.
  2. Press Windows key + R, type outlook.exe /safe and press Enter.
  3. If the status bar shows Connected in Safe Mode, an add-in is the cause. Close Outlook and open it normally.
  4. Go to File > Options > Add-ins. Set Manage to COM Add-ins and click Go.
  5. Untick all add-ins, click OK and restart Outlook. Re-enable them one at a time, restarting each time, until Disconnected comes back. That last one is the faulty add-in, so leave it off and update or remove it.

5. Repair the account or create a new Outlook profile

Classic Outlook for Windows. Repair is not available in Outlook 2016 for Exchange accounts, so use a new profile instead.

  1. Go to File > Account Settings > Account Settings.
  2. On the Email tab, select your account, click Repair and follow the wizard. Restart Outlook when it finishes.
  3. If Repair is greyed out or does not help, close Outlook, open Control Panel, search for Mail and open Mail (Microsoft Outlook).
  4. Click Show Profiles > Add, name the new profile, and add your email account.
  5. Select Always use this profile, choose the new profile, click OK and open Outlook. Mail downloads again from the server. Your old profile stays in the list until you remove it.

6. Update and repair Office

Microsoft 365 and Office 2024/2021/2019 on Windows 10 and Windows 11

  1. In Outlook, go to File > Office Account > Update Options > Update Now, then restart Outlook.
  2. If that does not help, close all Office apps.
  3. Windows 11: Settings > Apps > Installed apps, click the ... next to Microsoft 365 (or your Office version), then Modify. Windows 10: Settings > Apps > Apps & features, select Microsoft 365, then Modify.
  4. Choose Quick Repair first. If Outlook still shows Disconnected, run it again and choose Online Repair, which reinstalls Office and takes longer.

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Still not fixed?

If Outlook on the web also fails to load your mailbox, the problem is with the mail service. Check the Microsoft 365 service health page (for work accounts, ask your IT admin) or the service status page for your email provider, then wait for it to be fixed. If the web version works but no Windows fix helps, contact your IT department with the Connection Status results (Ctrl + right-click the Outlook tray icon). For on-premises Exchange, admins should check the mailbox's legacyExchangeDN attribute for a trailing space, as Microsoft documents in KB 3068991. Personal Outlook.com users can contact Microsoft Support from support.microsoft.com.

Questions people ask

What is the difference between Disconnected and Working Offline in Outlook?

Working Offline means offline mode was switched on with the Work Offline button on the Send / Receive tab, and clicking it again turns it off. Disconnected means Outlook tried to reach the mail server and failed, so the cause is a network, sign-in or server problem.

Why does Outlook say Disconnected when my internet is working?

The most common reason is old or corrupted saved credentials, especially after a password change. Remove the MicrosoftOffice16_Data and MS.Outlook entries in Windows Credential Manager and sign in again. VPNs, proxies and add-ins can cause the same symptom.

Will I lose my emails if Outlook is disconnected?

No. Mail already downloaded stays readable, and new messages wait on the server until Outlook reconnects. Anything you send while disconnected waits in the Outbox and goes out automatically once the connection comes back.

Does new Outlook for Windows or Outlook for Mac show Disconnected?

The Disconnected status bar message is from classic Outlook for Windows. New Outlook and Outlook for Mac show their own offline or sync messages instead, and the Credential Manager and profile fixes on this page do not apply to them.

Why does the Work Offline button not appear?

For Exchange and Microsoft 365 accounts, Microsoft says Work Offline may be unavailable when Cached Exchange Mode is turned off. Turn it on in File > Account Settings > Account Settings > Change, then restart Outlook.

Sources

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