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Unlike error 0x80040154 on win 10 which has a rather complicated troubleshooting process, fixing error 0X8500201 is quite simple and there are some ways to completely resolve this issue when you cannot synchronize email on Windows 10 below.
GUIDE TO FIX ERROR X8500201 WHEN SYNCING EMAIL IN WIN 10
Method 1. Turn on/off Email synchronization mode
The first thing you need to do is try turning off and then turning back on the sync mode in the Mail app to fix. This is a quite effective method when encountering error 0X8500201.
Log in to your account experiencing the error on the Mail app. Right-click on the account name and select Account Settings.
Next, choose Change mailbox sync settings on the small window that appears to configure some sync settings.
Here, you scroll down to find the Sync Options section, turn off all options for syncing Email, Calendar, Contacts, then close the Email app.
Next, restart the app and go to Sync Options to enable the sync options. Then, try restarting the app to see if error 0X8500201 still appears.
Method 2. Remove and re-add your account
If you've tried turning on/off sync mode but still encounter error 0X8500201, then delete and re-add your account following the steps below.
Log in to your account and select Account Settings. Here, click on Delete Account to remove the connection of the account encountering error 0X8500201 with the Mail app.
Then log back into your Outlook account on the app and try syncing again.
Method 3. Combine with the People app
Open the Mail app and delete the mail account experiencing sync issues as in method 2. However, don't rush to add the account back; instead, launch the People app and select Add Account to add your mail account encountering error 0X8500201.
Next, restart the Mail app, then add your account to the app and go to Sync Options to turn off the Sync Contacts option so you can sync mail data normally.
Here are 3 methods to help you fix error 0X8500201 when syncing Email in Windows 10. You should block emails in Hotmail to avoid syncing as well as receiving junk, spam messages in Hotmail. If you want to manage emails better, you can also use email management with Outlook 2013 on your computer.
Wishing you success!
