How to access and/or delete an invisible Exchange account? I seem to have somehow developed an invisible exchange account on my rooted (but otherwise stock) 4.1.2 AT&amp;T HTC One. I don't know at what level to attack this problem -- is it a Sense issue or an Android issue? What app or data should I delete / uninstall or clear?

If I go to Settings -> Accounts &amp; sync -> under the "Manage Accounts" area there is no Exchange ActiveSync account even listed.

If I try to add an "Exchange ActiveSync" account I get the Error message in a popup box that says "You have already set up this Exchange account." Googling for that message or searching for it on xda did not yield anything helpful.

I'm not sure if this developed at some point from a Nandroid restore or what...

Does anyone know how to delete this invisible Exchange account that it says I have already set up? I can't see the account anywhere to delete it, but it's data must exist somewhere inside "Accounts &amp; sync" and so it thinks I have already set it up... I'd like to delete it for real and then re-add it.

UPDATE #1: I don't use any Exchange services (Outlook Web, nor MS Outlook).
I think I have encountered a similar issue before. Not sure how I fixed it, but


see if you have a Device Administrator for Exchange. In the Samsung Galaxy S4, it's in Settings &gt; More &gt; Security &gt; Device Administrators. Uncheck / Remove it there, do a restart, and see if that helps.
or:  Go to your application manager, and swipe to the ALL section. Then look for the Email app. Click that and do a Clear data and/or Clear cache. Also, look for the Exchange services app, and do the same. Restart, and see if that helps. 


Based on Asker's feedback, the second approach fixed the problem. He also cleared the GMail app, although it's not necessary.