I have three users with iphones connected to the exchange server thru imap.
Before when they would delete emails from the iphone in the inbox they
would still remain in their inbox on the server, but as of late this is not the case.
The emails are no longer on the server when they delete them from the iphone.
How can I correct this ?

Before when they would delete emails from the iphone in the inbox they
would still remain in their inbox on the server, but as of late this is not the case.
The emails are no longer on the server when they delete them from the iphone.
How can I correct this ?