Microsoft Lync for Mac OS had a bug like this; if the system uptime was > 49.7 days, the user’s presence would get stuck as “Away”. Presumably it was using upt

Microsoft Lync for Mac OS had a bug like this; if the system uptime was > 49.7 days, the user’s presence would get stuck as “Away”. Presumably it was using uptime as time clock for establishing presence and once it overflowed the comparison failed.