Hi, I'm using ZCS 8.2, all thing ok, but my user have trouble with using outlook all version 2007 - 2010 - 2013. Before that, they using google apps mail, and then switch to ZCS, but the mistake quite strange, when first time adding acc, they can send/receive mail ok; however, in next day, they cannot receive any mail but the webmail is ok. I had tried to reinstall office and event reinstall windows and outlook to but it's still happen. Then, I tried to adding 2 acc in outlook, and the problem not happen, they can get mail normally, but after 3 days, they cannot receive any mail again

So silly and I can't understand why Hope someone can help me.