This window takes the focus off other applications.
For example, if a user is doing data entry into an ERP application, the "Updating Inbox" interrupts the data entry and takes the focus off the ERP application.
Our Exchange box is at HO and we connecting with 1,5 Mb lease line MPLS. What is the prefered method to download email from large mailbox if Exchange is not LAN.
Well this was a very well known issue as the title explains but in my case, the "updating inbox 3.99GB" keeps on repeating to the same state.