Outlook Email Error Code 21999
In this fast growing economic world sending and receiving emails is an important mode of communication. In this domain Microsoft outlook is playing an essential role and providing services. Microsoft Outlook provides assistance for your email messages, calendar events, tasks, and other items in either an Outlook for Windows Data File (.pst) or an Outlook for Mac Data File (.olm).
We know that technology has its own limitations and what would a user do if user cannot send or receive mails by using Outlook service? This type of error in outlook regarding error in sending or receiving email is known as “outlook error code 21999”. In this article readers get the instructions for handling these type of errors. So, everyone get ready for this knowledgeable journey and learn methods for solving the issue as soon as they encounter this error in Outlook. Most of the Outlook errors are simple to resolve just by giving a restart to your system/Outlook, by checking account settings, or using scan PST, etc. But there are some issues that require categorical methods to solve them. Outlook usually use by Microsoft Office users but Mac users are also getting service of this software as desktop email program built specifically for Apple’s Mac operating system by the IT giant Microsoft. In this article we will be looking at how users can resolve this error for Mac computers and solutions to avert it in the future. When the user tries to synchronize email with MS Exchange for various reasons, many problems occur, ultimately leads to the inaccessibility of stored data. Even failure in sending and receiving emails causes all scheduled activities to fail and leads to disrupt business flow wherever the client-server application is installed.
In this article, users will be going to read causes for outlook error code 21999, and methods to resolve it. So, in the section below, we have listed some common causes that leads to the error along with the reason for their occurrence.
Outlook perform synchronization but some users complain of Outlook for Mac error ‘Microsoft Sync Services has encountered a problem and needs to close’. We are sorry for the inconvenience’. To fix this error it is advised to clear the Outlook Mac cache
Unexpected Outlook errors are difficult to handle and we are really tired of such errors. These errors difficult to understand that can bring your daily work to halt whereas some errors are self-explanatory. One such Outlook error is “21999” – it occurs during sending or receiving an email. Such errors might not be very easy to comprehend on first look.
The truth is that it is not that difficult to fix Outlook error codes and a few easy steps are all you need. This write-up is focusing on the MS Outlook error 21999 which indicates that there has been an interruption in the connection to the server.
Mac Sync Errors 21999 Outlook 2010,2013,2016, 2019, Microsoft 365
Causes And Reason Behind 21999 Error Outlook
Causes for the error:
Unexpected errors in outlook are become difficult to handle and users are really irritated of such errors. These errors are difficult to understand and can bring your daily work to a halt whereas some errors are simple and self-explanatory. One such Outlook error is “21999” – it appears during sending or receiving an email. This error might not be very easy to understand on first look.
The fact is that it is not that difficult to resolve Outlook error codes and a few easy steps are all require by users need to follow. This write-up is focusing on the MS Outlook error 21999 which indicates that there has been an interruption in the connection to the server.
Now, Causes behind Outlook error 21999 include:
1) Terrible synchronization of software with system.
2) Antivirus applications creates hindrance in smooth functioning.
3) Big attachment in the messages in the software.
Outlook for Mac has the following limitations also:
- Users are not able to send email messages from a distribution list, a security group, or a mail-enabled Public Folder.
- Users are not able to use a distribution list, a security group, or a mail-enabled Public Folder as a delegate.
Effect Of Microsoft Outlook 21999 Error Message
Symptoms for the error:
When users are trying to send email messages from a distribution list, a security group, or a mail enabled Public Folder, Outlook for Mac 2011, Outlook 2016 for Mac, or Outlook for Mac 2019 times out, and users receive one of the following error messages:
Console Copy
Error: An unknown error has occurred in Outlook.
Details: Mail could not be sent. The message has been moved to your Drafts folder.
Error code: -19991
Error: An unknown error has occurred in Outlook.
Error code: -19992
Error: An unknown error has occurred in Outlook.
Details: Mail could not be sent.
Error code: -21999.
How To Fix MS Outlook Mail Error Waring 21999
Steps to fix error:
There are certain Troubleshooting steps which help in solving the issue:
1) Reset internet settings in the system.
2) Reinstall antivirus if it is creating a hindrance.
3) Remove unwanted mail.
If the above methods do not help users in solving the issue then users must follow the below listed steps to resolve the issue.
These steps are:
Methods to Solve ‘Outlook for Mac Sync’ problem:
Users must follow the steps mentioned below to solve Outlook 2016 Mac Sync problem:
- Disable Sync Services Preferences
- Give a command to start Outlook in your system (if it opens).
-
- Then go to outlook menu and click on Preferences.
- Under the Other options go and select Sync Services.
- Uncheck all the boxes and close Outlook.
- Then give a command to restart Outlook and check the error is solved or not.
This will ultimately disable the sync services, if the issue is resolved it projects that the sync preferences are corrupted and needs to be reset. To reset Outlook for Mac sync issues follows the steps mentioned below:
Command for Force Quit Outlook:
- Go and click on the Apple menu
- A dialog box with all the active/ running applications will pop up
- Select all the applications but do not select Finder
- And finally click on the ‘Force Quit’ button
- But Before quitting any application, keep back up all items and Outlook identities for later use.
After performing synchronization for outlook still some users face the issue of Outlook for Mac error ‘Microsoft Sync Services has encountered a problem and needs to close’. We are sorry for the inconvenience’.
To fix this error it is advised to clear the Outlook Mac cache
- First of all disable Sync services and close all applications that are running.
- Go to the menu and click on Applications>> Utilities and then open Activity Monitor.
- Type Sync to in the box.
- Quit all the processes found in the software.
- When the users completes the task close Activity Monitor.
- Then go to Home and then click /Library/Application Support/,
- And Open Sync Services and move all the files to there.
Then gives command to restart all applications and turn on sync services
This will resolve the issue of Outlook for Mac Sync Error. Users may try any of the above discuss methods as per the system and error encountered. But there always a good habit of taking back up files before starting any process. These manual steps will remove the Microsoft Sync problem in Outlook for Mac.
If the error is still not resolve then users need to look in their firewall. Firewalls can interfere and block incoming and outgoing traffic and this creates hindrance in the working of outlook. So users make sure that Outlook and/or the required ports for email are listed as an exception to go through it.
If users are facing the send/receive errors after updating Outlook, then probably they need to reconfigure their firewall to re-allow Outlook to pass-through again. The reason behind it is that many firewall solutions verify everything in depth so that the correct outlook.exe that is trying to pass through the firewall may pass and not any virus which named itself outlook.exe. As with most software get updates the outlook.exe is not an exception and gets updates as well, you’ll need to accept it as safe again. And to understand it more users can find more information about this in the manual of your firewall solution.
Virus scanners which integrates themselves with Outlook are become the source of causing all sorts of send receive issues. Users by disabling their virus scanner’s integration with Outlook resolves the problem and it does not leads to any compromise with their system’s safety.
After reading this article now users can resolve the issue of outlook error 21999 and enjoy the smooth functioning of the outlook.
