Perosn A has set his/her "working hours" in Outlook to be 8-5.

When a Mac Lync user hovers over person A's contact in Lync - the calendar status returned acts as if the person's working hours were 9-6. 

For example, the calendar status might read "not working until 9:00am" even though person A's working hours start at 8,  Later the calendar status might read "free for the next 8 hours" while a Windows user will see a status of "working until 5pm".  However, if person's A has a calendar event anywhere that day, the calendar status returned to Mac Lync users will be correct based on a free status before the calendar event.

The one hour issue is only for a Mac Lync user and only when calendar status being returned is based on the other person's "working hours" (e.g. there are no calendar events on that other person's calendar for the day.

We are using 14.3.2. I've verified that all the Mac clients work the same.

As an example, I set my "working hours" from 1-5pm in Outlook - verified in OWA. At my time of 1:21pm,  Mac Lync shows my calendar status as "Not working until 2pm" (hover over the person's name in the Lync list), Windows Lync shows "free until 5pm" (hover over person's photo or presence square and click "Contacts" icon when it appears with other.