Outlook Anywhere Access after Mailbox migration

Hi,

i am in the middle of an exchange migration from 2007 to 2013.

I have users that only use Outlook from Homeoffice over Outlook Anywhere (RCP over HTTPS).

I have the problem that after migrating mailboxes from 2007 to 2013 the users must reconfigure their outlook settings to have access. I thought outlook will recognize this itself.
Do the users need to reconfigure their settings or should outlook do that automaticly?

If it should works automaticly what could be the problem that it does not work for me.

Both Servers are available over https and outlook anywhere is also configured.

regards,

Frank