Select the account you’d like to manage, then choose Settings > Accounts & Sync. scroll down, select your name, then Choose Media & Purchases. Tap View Account to see the rest of the options. Tap Remove This Device at the bottom of the screen.
Open Gmail, and go to the Applications menu. Select Email from there. From the Settings page, select Accounts. Continue holding until you see the Menu window appear. Remove Account from it by clicking Remove Account on the menu screen. … To finish removing an Exchange account, click OK or Remove Account on the warning window that appears when you press and hold
On your iPhone or iPad, open the Gmail app and log in. In the upper right corner, tap your profile photo. On this device, choose Manage accounts. Remove may be selected from the drop-down menu that appears when you touch Cancel Account Settings on this device (see below).
