I am using Exchange 2010 SP1 on Windows server 2008 R2 with outlook 2010 and OWA.

I am trying to add full access permissions to a user's account. I have tried adding the full access permission through EMC and powershell. Both times the permissions are added without any error msg. But never appear on my outlook or other user's outlook.

I have tried on a lot of  accounts and no luck .

I can set full access permission a few months ago but now can not.

Any help ?? I need to give a lot of filing accounts full access permission to one admin user and now facing trouble.