This is using MS Exchange server 2016, fully migrated from Exchange 2013. Now, in outlook, when user want to search for any mail by keyword, etc, they got blank. This problem didn't happened with exch 2013 server alone. I remember back to the exch 2010 time, there is a certain steps to "rebuild the search index". Do we have to do the same step to get the searching work?
Thanks in advance.