8500201D : Fix Windows 10 mail sync error Easily

A common complaint with lot of users using the latest Windows operating system is the appearance of Error Code: 8500201D on the device screen.

This is a syncing error that mostly affects the Mail and Calendar apps, which are closely connected. Your computer or phone may be working properly only to realize that the Mail app cannot open, which makes it impossible to add new email account or access your mail. The problem is not restricted to Mail and Calendar apps; it can also affect other apps as well.

There is no doubt that both Mail and Calendar apps are very important since they keep you up to date. Not only do you stay in touch with others; the Calendar also helps in managing your schedule. The moment they fail to synchronize, it becomes very difficult to manage everything.


Synchronization errors including error 8500201D can occur because of various reasons including;

  • Misconfigured email account.
  • Corruption related to mail, contacts and calendar among others.
  • Use of incorrect password.

There are several methods of resolving mail and calendar sync 8500201D error while syncing, and although the following methods are specific to resolving the error in PC and tablets running on Windows OS, some are cross-cutting and can as well resolve the error in phones.


Fix Sync Error code 8500201D in Windows


Steps to fix Sync error 8500201D


Method 1 – Check for Updates to fix 8500201D error

This is the simplest and straightforward method you can use to resolve the error. In addition to ensuring that automatic updates feature is enabled, you also need to make sure that you have the latest updates, particularly for Mail and Calendar apps. It is also important to run an update of both the OS and apps.


Method 2 – Change Privacy Settings

The latest Windows OS (Windows 10) collects a lot of data and information. It also many options when it comes to privacy settings. Choosing a privacy setting that blocks Microsoft from accessing either the Calendar app simply means that the Mail app will not work properly because of their close connection. Changing privacy settings can, therefore easily resolve the error.

  1. Go to “Start” to access the “Settings” app.
  2. Navigate to “Privacy section.”
  3. Select “Email” and turn on “Let apps access and send email.
  4. Go to “Choose apps that can access and send email” and turn on “Mail and Calendar.
  5. Click on “Calendar” and turn on “Let apps access my calendar.” Also, make sure that App connector is turned on.
  6. Restart your computer or device before running Mail app to see whether the Outlook error 8500201D is resolved or not.


Method 3 – Use Secure Connection

This method can help resolve the Synchronize error 8500201D in case you are not successful with the above method.

  • Open the Mail app.
  • Click the settings icon at the bottom on the left.
  • Select your account before going to “Change mailbox settings.
  • Check “Server requires encrypted (SSL) connection and Email” right under the sync options.
  • Restart your computer to see whether or not this resolves the problem.


Method 4 – Change Account Sync Settings to fix 8500201D error.

The fact that Windows 10 downloads mail for the last fortnight gives you a way to resolving the error by simply changing the time frame for downloading mail.

  • Go to “Settings > Manage Accounts” and pick the account you need to change.
  • Choose “Change Mailbox Sync Settings.
  • It is very important to note that inability to choose the above means that Windows is probably trying to your mail. You need to wait for several minutes before trying to choose it again.
  • Choose “Any time” under “Download email from” to see your old mail.
  • Restart your computer/Mobile to see whether or not your sync error 8500201D is fixed.


Method 5 – Uninstall/Re-install Mail app

You have the option of uninstalling and re-installing the Mail app in case any of the above methods fail to resolve the error.

  • Open “Start.
  • Search for “Windows PowerShell.
  • Right-click on it and select “Run as administrator.
  • Type “Get-AppxPackage Microsoft.windowscommunicationsapps|Remove- AppxPackage.
  • Performing the above action removes both Mail and Calendar apps, which gives you the opportunity to re-install them again in the fresh state from Windows Store.
  • Open Windows Store to re-install Mail app.
  • Search for “Mail and Calendar.”
  • Go to on the Mail app.
  • Click the “Install” button to re-install the app.
  • Go back to Start before opening the Mail app to complete setup.

It is possible to receive an error message when performing re-installation of Mail app. The solution to this is restarting your computer and opening Mail app again. Note that you need to re-configure your email accounts once again after successful re-installation of Mail app. This should most probably help you to get rid of annoying 8500201D error.


Method 6 – System Restore should fix 8500201D

You have the option of restoring your computer’s system to a time when it worked without any issues. This method applies to Windows 10 OS. Not that system restore is by default disabled in Windows 10, and you need to enable it.

  • Open “Search menu.
  • Search for “System Restore.
  • Click “Create a restore point” on the resultant window to go to “System Protection Tab.”
  • Select your desired drive from resultant list of drives.
  • Go to  “Configuration“.
  • Tap on “Turn on system restore” in the resultant window.
  • Click “Apply” before clicking “OK” to save the new configuration.
  • Close the window and restart your computer to see whether or not doing this fixes the 8500201D error.


Method 7 – Fresh Windows Installation

Formatting your computer’s hard disk and performing fresh Windows OS installation may be your only remaining option just in case all the above methods fail to resolves sync error 8500201D. It may occur that cause of the error is not limited to Mail and Calendar apps, but a combination of many factors.

Inability to access your mail or stick to your schedule because of error code 8500201D can be a very frustrating experience. It is therefore very necessary that you keep your computer or any Windows device up-to-date.

You can easily do this by downloading updates whenever they are available. It is also important that you occasionally run apps that you do not often use even when you do not need to use them.

1 Comment
  1. Reply stan lea November 15, 2016 at 7:11 pm

    Info re add mail & calendar in privacy setting is out of date & no option now to add apps there anyway.

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