I recently up graded to an Exchange email account by 1and1, previously used basic mail via IMAP but wanted to sync our calendar across our devices 1 laptop, 2 x iphones and 1 tablet. I created a PST for the 2 x email addresses we have but they haven't installed how I thought they would.
In the left hand bar where the inbox and folders are in between our email adds I now have a mail inbox called outlook datafile and below that there is the message that we have sync issues.....
The sync issues are a real pain help......please TIA.