Can anyone advise me what to do for the following message:
Zimbra Desktop is unable to synchronise data from ..........(email address)
re-enter the password and click Save to re-authenticate the account.

I do this and then it comes up with:
An unknown error
gdata.Invalid Credentials has occurred. OK

I have tried going into the account settings and edit and re-typing the password but it still says that it need authenticating and asks again that password is incorrect.

Can anyone suggest any ideas???