Follow the guide to remove your Life.Church email from your Android device.
Note: Your exact steps or screens may differ depending on which device you have.
From you applications page, click 'Settings.'
From the 'Settings' page, scroll down and locate the 'Accounts' section. Tap the one for Exchange or corporate email.
Note: Some Android phones will have an 'Account' tab on the top of the screen.
From your Exchange Account page, tap your account.
Tap the menu icon and then 'Remove account.'
Note: Some android phones have the 'Remove account' option along the bottom of the screen.
Tap 'Remove account' on the pop-up to finish the removal of your account.
Note: This will remove all Exchange related items from your phone -- email, contacts, calendars, etc -- but will they will not be deleted from the server.