This procedure is applicable for a Samsung Galaxy S6, S6 Edge, Note 5, and similar Samsung devices running Android 5.1 (Lollipop) or higher software versions.
To delete an Exchange or other Email account on the mobile device take the following steps:
1. From the Home screen swipe down and tap on the Settings gear icon.
2. Scroll down and tap Accounts.
3. Tap Microsoft Exchange ActiveSync.
4. Tap More.
5. Tap Remove Account.
6. Tap Remove Account again to confirm the request when prompted.