To do this click on the down arrow v on the right side of the search bar and deselect Use server search if available. Also, while you’re in this search menu, double check that you’ve selected the correct search parameters, such as searching in All folders and searching for your keyword in the Subject, Sender, Recipients, Body and Attachments fields.

Read more in our blog: Search Like a Pro in eM Client

However, if you still want to monitor the progress of your sent emails and updating folders, you can open the Operations window by going to Menu > Operations.

If you want the Operations window progress bar to always be displayed as you send and receive messages, you can turn on this feature under Menu > Settings > General > General > Operations Window and select the box for Show window on send and receive.

If you do have the latest updates, you can check and/or install the missing certificate directly.

Go to the eM Client installed program files, default C:\Program Files (x86)\eM Client.
Find MailClient.exe and open its Properties.
Open the Digital Signatures tab.
Click the eM Client s.r.o. signature in the list and open Details.
Check the signature here.
If it's shown as invalid, select the Microsoft signature at the bottom and open its Details.
Then click View Certificate button and check the Certification path.
if there is any Microsoft certificate missing (a red X over the certificate icon), install it or add it to trusted certificates.

You can find Microsoft certificates in their repository here: https://www.microsoft.com/pkiops/docs/repository.htm
Search for the name of the missing certificate, download it, and when installing it make sure to select the folder (store) manually and save it into Trusted Root Certificates Authorities.

That should resolve the issue - restart your device and start eM Client again.

For eM Client 9.2.1222 and older you can use this solution:

To check if you are affected by this problem, please check this webpage: https://trusted-root-g4.chain-demos.digicert.com/
If the page shows a warning, you need to update your root certificate DigiCert Trusted Root G4.

This can be sorted by installing available security updates for your Windows or you can find the updates manually here: Support for urgent Trusted Root updates for Windows Root Certificate Program in Windows

You can also manually download the certificate here: 

DigiCert Root Certificates | DigiCert.com

Direct download for DigiCert Trusted Root G4 | DigiCert.com

To avoid similar issues in the future, make sure you have the Windows Root certificate AutoUpdater active.
This can be changed in Windows registry directly in HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\SystemCertificates\AuthRoot
Just make sure the DisableRootAutoUpdate key is set to 0.

If the issue is not resolved even after manually updating or re-installing the missing certificates, you can reinstall the app in case the issue was in the corrupted program files.
Follow these steps:

- Uninstall eM Client (do NOT delete your database)
- Make sure the eM Client folder and files are gone from C:\Program Files (x86)\eM Client or C:\Program Files\eM Client
If not, delete them manually.
- Then download and install the app for your licensed version from an official file downloaded from our website: https://www.emclient.com/release-history

You will never receive an update prompt that your activated license is not valid for, but if you'd rather just use an older version indefinitely and don't want to reject updates every month, there can be a manual update limit set on your license and activation.

Business license owners can set this limit (called "Set Version") via the License Manager. Just open your Activations tab and click Set Version. Select the version you want to use from the list and save this setting.

Free or Personal license users can send a request for an update limit to info@emclient.com

[SMTP] MailClient.Accounts.AuthenticationAbortedException: Authentication aborted.

This issue is caused by a new problem on Microsoft's modern OAuth login method, settings up the account with an older version of the OAuth authentication in the meantime will work.

For the workaround, follow these steps:

Windows

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Download and run the registry file in this article - useoldoutlookcomflow.reg
  (this file can be downloaded at the bottom of this article, in the Attachments section)
• Open eM Client and log in using the OAuth window that pops up.

macOS

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Open Terminal and run this command: defaults write com.emclient.mail.client UseOldOutlookComFlow -bool TRUE
• Open eM Client and log in using the OAuth window that pops up.

Once Microsoft fixes this issue, you can either keep the older OAuth or remove the workaround with these steps, which are just the reverse of the previous ones:

Windows

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Download and run the other registry file in this article- removeoldoutlookcomflow.reg
• Open eM Client and log in using the OAuth window that pops up.

macOS

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Open Terminal and run this command: defaults delete com.emclient.mail.client UseOldOutlookComFlow
• Open eM Client and log in using the OAuth window that pops up.

 If you want to fully turn off the feature, you can do so in menu > Settings > Mail > Categories.

1. Go to Menu > Accounts (Windows) or eM Client > Accounts (macOS)
2. Click '+Add account'.
3. In the New Account window, select Mail > Other.
4. Insert your Gmail account address.
5. For the incoming POP3 server, enter: pop.gmail.com
6. For the outgoing server, enter: smtp.gmail.com
7. Continue the setup. You will be redirected to your browser to grant access via OAuth.

1. Go to Menu > Accounts (Windows) or eM Client > Accounts (macOS)
2. Click '+Add account'.
3. In the New Account window, select Mail > Other.
4. Insert your MS365 account address.
5. For the incoming IMAP or POP3 server, enter: outlook.office365.com
6. For the outgoing server, enter: smtp-mail.outlook.com
7. Continue the setup. You will be redirected to your browser to grant access via OAuth.

Screenshots on Windows 7/10/11:

To take a screenshot of your entire screen:

• Press Windows (⊞) + Print Screen (PrtScn) on your keyboard.
• To send by email:
  • Click in the body of the message.
  • Press Ctrl + V to paste the screenshot.
• To send through the support center:
  • Open the program Paint (press Windows (⊞), type “Paint,” and press Enter).
  • Press Ctrl + V to paste your screenshot into Paint.
  • Press Ctrl + S to save the file somewhere you can find it, like your Desktop.
  • Click Add file under your support ticket and select the screenshot you saved.

To take a screenshot of a single window:

• Click the window you want to capture to make sure it is active.
• Press Alt + Print Screen (PrtScn) on your keyboard.
• To send by email:
  • Click in the body of the message.
  • Press Ctrl + V to paste the screenshot.
• To send through the support center:
  • Open the program Paint (press Windows (⊞), type “Paint,” and press Enter).
  • Press Ctrl + V to paste your screenshot into Paint.
  • Press Ctrl + S to save the file somewhere you can find it, like your Desktop.
  • Click Add file under your support ticket and select the screenshot you saved.

Screenshots on macOS:

To take a screenshot:

• Press Command (⌘) + Shift + 5 on your keyboard.
• A small menu will appear with options. Select one:
  • Capture Entire Screen (screen icon)
  • Capture Selected Window (window icon)
• Click Capture. The screenshot will be saved automatically on your Desktop.
• To send by email: Drag the screenshot from your Desktop into the message.
• To send through the support center:
  • Click Add file under your support ticket and select the screenshot you saved.

Screen recordings on Windows:

Windows 11 (Snipping Tool)

• Press Windows (⊞) + Shift + R on our keyboard.
• Click and hold your mouse, then drag over the area you want to record.
• Click Start. Three seconds later, it will start recording.
• To stop recording, click Stop.
• A window with your recording will open. Press Ctrl + S to save the file somewhere you can find it, like your Desktop.
• To send by email: Drag the saved file into your email message.
• To send through the support center: Click Add file under your support ticket and select the screenshot you saved.

Windows 10 (Xbox Game Bar)

• Press Windows (⊞) + G on our keyboard.
• If prompted, click Yes, this is a game.
• Press Windows (⊞) + Alt + R to start recording.
• To stop recording, press Windows (⊞) + Alt + R again. The recording will be automatically saved in Videos\Captures.
• To send by email: Drag the saved file into your email message.
• To send through the support center: Click Add file under your support ticket and select the screenshot you saved.

Screen recordings on macOS:

• Press Command (⌘) + Shift + 5 on your keyboard.
• Choose Record Entire Screen (screen icon with a dot).
• Click Record.
• To stop recording, press Command (⌘) + Ctrl + Esc. The recording will be automatically saved on your Desktop.
• To send by email: Drag the saved file into your email message.
• To send through the support center: Click Add file under your support ticket and select the screenshot you saved.

In the Online Meeting logs this typically appears as:

• "AuthenticationError – Error authenticating with resource"
• "allowedOnlineMeetingProviders":["unknown"]
• "defaultOnlineMeetingProvider":"unknown"

This issue started after Microsoft retired Skype in May 2025 and moved users to Teams Free. Personal Skype users could sign in and keep their chats and contacts, and Teams initially worked in eM Client.

As the migration progresses, MS personal account users now report being unable to create new online meetings and see the error above.

This is caused by how Microsoft permits online meeting creation:

• eM Client (a third‑party app) must use the Microsoft Graph API to create online meetings.
• Microsoft’s Graph API restricts Teams meeting creation to Microsoft 365 work or school (Azure AD) accounts with Teams enabled and licensed.
• Personal Microsoft accounts are not supported for this API, so the request is blocked and eM Client shows “unknown” as the provider. This is why Teams works in Outlook or the Teams app (which use Microsoft’s internal APIs) but not through eM Client.

Solution:

If you need to create Teams online meetings in eM Client, you must use a Microsoft 365 work or school account that has Teams properly enabled and licensed.

Personal Microsoft accounts cannot be used to create Teams meetings via eM Client (or any third‑party application) because the Graph API does not support this scenario.

Screen recordings on Android:

• On most Android phones:
  • Swipe down from the top of your screen to open the top menu and look for a “Screen recorder” button.
  • Tap it and “Start recording”. A few seconds later, it will start recording.
  • To stop the recording, tap the square button on your screen. The video will be saved to your Gallery app.
• To share in a new message:
  • Tap the Share button (three connected dots).
  • Select eM Client or another email app. A new message will open with the video attached.
• To share in a reply:
  • Open the reply you’re writing and add the video as an attachment (a paperclip icon).

Screen recordings on iOS:

• On most iOS phones:
  • Open Settings > Control Center > Customize Controls. Tap the plus sign next to Screen Recording.
  • Tap the gray Record button. Three seconds later, it will start recording.
  • To stop the recording, tap the red Record button. The video will be saved to your Photos app.
• To share in a new message:
  • Tap the Share button (a box with an upward arrow).
  • Select eM Client or another email app. A new message will open with the video attached.
• To share in a reply:
  • Open the reply you’re writing and add the video as an attachment (a paperclip icon).

Looking for how to record your screen on your computer?

Screenshots on Android:

• On most Android phones:
  • Press the Power button and the volume down button at the same time.
  • Or: swipe down from the top of your screen to open the top menu and look for a “Take screenshot” button.
  • The video will be saved to your Gallery app.
• To share in a new message:
  • Tap the Share button (three connected dots).
  • Select eM Client or another email app. A new message will open with the image attached.
• To share in a reply:
  • Open the reply you’re writing and add the image as an attachment (a paperclip icon).

Screenshots on iOS:

• If your iPhone uses Face ID:
  • Press the side button and the volume up button at the same time.
• If your iPhone uses Touch ID:
  • Press the side button and the Home button at the same time.
• To share in a new message:
  • Tap the Share button (a box with an upward arrow).
  • Select eM Client or another email app. A new message will open with the image attached.
• To share in a reply:
  • Open the reply you’re writing and add the image as an attachment (a paperclip icon).

Looking for how to take a screenshot on your computer?

• VersionNotSupported
• The input string '' was not in a correct format.
• Invalid namespace Meeting Response

If you want to keep using version 9, you can switch the sending protocol from AirSync to SMTP.

On Windows:

Close eM Client. Download and run this configuration file to update the Windows registry.

You can also change it manually if you prefer:

• Run REGEDIT in Windows Start menu
• Navigate to HKEY_CURRENT_USER\Software\eM Client
• Right-click > New > DWORD and name it UseAirSyncSendMail

On macOS:

Close eM Client. Open Terminal and run this command:

defaults write com.emclient.mail.client UseAirSyncSendMail -bool FALSE

After switching to SMTP, open Menu > Accounts (or eM Client > Accounts on macOS) and disable AirSync under Services. This stops the errors, but Outlook calendar and contacts will no longer work. You can use the local calendar and contacts or add these services from another provider.

If throttling continues for an extended period of time even with these precautions, there might be additional issues on your email provider's side. In that case, please report this to the Google support team so they can look into it or reconsider these limitations. 

How can you tell if your account is being throttled?

Throttling is usually visible in the IMAP diagnostic logs. A snippet of what it looks like in the logs:

01: A3 OK Success [THROTTLED]

01: A4 NAMESPACE

01: * NAMESPACE (("" "/")) NIL NIL

01: A4 OK Success [THROTTLED]

01: Detected server type: Gmail

01: A5 ENABLE CONDSTORE

01: * ENABLED CONDSTORE

01: A5 OK Success [THROTTLED]