Windows 10 Mail application tells me that my account is already added

When I open the mail app it asks me to add an account, I click add and I enter all my details then I get a message telling me that the account is already added and it takes me back to the add account screen and I can't access my mail. Maybe I am missing something and I am supposed to access my mail somewhere else but I can't figure it out, can you help please?

Basically I have tried

Get-appxprovisionedpackage –online | where-object {$_.packagename –like "*windowscommunicationsapps*"} | remove-appxprovisionedpackage –onlinesfc /scannow
Run [ WSreset ]
Dism /Online /Cleanup-Image /RestoreHealth

I cannot remove the mail app and it is not listed anywhere.

I fixed it myself, I had a corrupt file, I deleted all the files not folders in "AppData\Local\Packages\microsoft.windowscommunicationsapps" and next time I clicked on the mail app it opened the store(beta) i dont have the old one anymore for some reason, redownloaded mail and now it works perfect.

Expect it wont sync my mail accounts so I cant see my email now .....

I too am experiencing this on build 10162. It prompts me to add my account, and once I do so, it says your account already exists, leaving me with no option to do anything.

I have the same problem 10166, reinstalled the mail app and still didn't worked.

Just updated to the latest build 10240 and this issue still remains.

Can someone please help me.

Windows 10 Pro 64bit