I can't test this for you.

But my last sync issue was the security suite. In the name of its privacy protection service it blocked apps from reading or writing to Outlook.

You may want to tell a lot more detail for anyone to guess what's up. Also, did you ask those that sold you this? That is support? It's a sure thing you're not the first one with this issue and I can't type in all the causes I've encountered so far.