How to Fix Outlook Rules Sync Error

• Take Outlook Rules Backup. Goto Outlook>Rules>Options>Export>RulesFile.rwz

• Then close the Outlook

• Take backup and Delete both NST and OST files from your outlook Folder (C:\Users\%username%\AppData\Local\Microsoft\Outlook)
• Or Run the Bat File to Take backup and delete the Files
@echo off

mkdir "C:\Users\%USERNAME%\Desktop\Outlook"

copy "C:\Users\%USERNAME%\AppData\Local\Microsoft\Outlook\*.nst" "C:\Users\%USERNAME%\Desktop\Outlook\"

copy "C:\Users\%USERNAME%\AppData\Local\Microsoft\Outlook\*.ost" "C:\Users\%USERNAME%\Desktop\Outlook\"

• After that please Run this > Then "windows" key + "R" > Run > (type).

• Type or paste outlook.exe /cleanrules in the Open field to clear all rules.

• Use outlook.exe /cleanserverrules if you know some client rules didn't sync up to the server.

• Use outlook.exe /cleanclientrules to keep the server rules.

• It will restart the Outlook application and recreate the new fresh OST and NST files.

• Then Import the Rules from Outlook..