Q: Outlook not displaying iCloud Calendars.

Not sure if this is an Outlook problem or an iCloud one. We sync our calendars to Outlook so all 4 of us can see each others' calendars.  On 2 of the PCs we are suddenly getting the message - "The set of folders cannot be opened. The information store could not be opened" and we can't access the calendars. The other 2 are working perfectly.

So far I have done a restart. I have also opened the iCloud settings dialogue box and unsynced the calendars, then done a restart, then set it up again. Still not displaying.

Can anyone help?

Thanks

Sue