We have Outlook 2010 connected to Exchange 2013 Server.
On New calendar invites User A sends an invite to User B with a 1 hour reminder time set up. User B reports that there is no reminder time at all.
This was reported yesterday.
This user had outstanding calls that have been going on for awhile also and now the calendar reminders aren't showing up.
There are other outlook 2007, 2010 and 2013, Win7 clients both x86 and X64 mostly x64 clients.
We did an exchange migration about 2 months ago from Exchange 2007 to Exchange 2013.
We are running Barracuda 650 mail archive appliance and upgrading to to Barracuda 850 appliance right now.