If you're a person who communicate with the help of email clients, then there are 90% chance that you must be a user of Gmail or Outlook. What if you're a user of both & facing similar issue of Gmail outlook not syncing. To get rid of this issue, one have to remove & re add his / her Gmail account in Outlook. If you don't know the steps of removing your Gmail account in Outlook, then you can find them in the link in the text above.