I have one user mailbox located on-premise exchange 2013 server. the user is showing under Organization->address lists->default global address list. but he is not showing in GAL in outlook 2013. i made sure that "hide from address list" is unchecked on his mailbox properties. i tried to look his address using OWA, but with no luck as well. i tried to remove my outlook from cached mode as well but with no result. keeping in mind his account is created long time ago. and the only way to email him is to type in his full email at the "To" field in outlook. i placed his account under All_Employees group, but once an email is sent to All_Employees, its not reaching him.
any advice? thanks in advanced to you all.