Here is the relevant extract from the log for a single calendar item, which sets an alarm every time.  Is that sufficient?

[calAlarmService] considering alarm for item: Office accommodation discussion alarm time: 2011/06/20 12:45:00 UTC isDate=0 snooze time: 2011/06/20 12:45:00 UTC isDate=0
[calAlarmService] now is 2011/07/02 12:49:32 UTC isDate=0
[calAlarmService] last ack was: 2011/06/20 12:44:59 UTC isDate=0
[calAlarmService] alarm is in the past and unack'd, firing now!

            <t:MeetingRequest>
              <t:ItemId Id="AAMkAGRlOTAzODBiLWI1NDUtNGQxYS04ZmE4LTkxZDA0NTNlOWRmMwBGAAAAAADIPD9BebNNR7ra47/Efb7OBwA3ysUaxcHSEZZhAKDJ7QAKAAAB61OHAADbViLTI6vzSpVKHEtQCrwaAAAADC74AAA=" ChangeKey="CwAAABYAAADbViLTI6vzSpVKHEtQCrwaAAAADPrc"/>
              <t:Subject>Office accommodation discussion</t:Subject>
              <t:Body BodyType="Text">When: 20 June 2011 14:00-14:30 (GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London.
Where: R3, 2.30

Note: The GMT offset above does not reflect daylight saving time adjustments.

*~*~*~*~*~*~*~*~*~*</t:Body>
              <t:DateTimeReceived>2011-06-17T07:44:19Z</t:DateTimeReceived>
              <t:ReminderDueBy>2011-06-20T13:00:00Z</t:ReminderDueBy>
              <t:ReminderIsSet>true</t:ReminderIsSet>
              <t:ReminderMinutesBeforeStart>1525252321</t:ReminderMinutesBeforeStart>
              <t:ExtendedProperty>
                <t:ExtendedFieldURI DistinguishedPropertySetId="Common" PropertyId="34144" PropertyType="SystemTime"/>
                <t:Value>2011-06-20T13:00:00Z</t:Value>
              </t:ExtendedProperty>
              <t:ExtendedProperty>
                <t:ExtendedFieldURI DistinguishedPropertySetId="Meeting" PropertyId="3" PropertyType="Binary"/>
                <t:Value>BAAAAIIA4AB0xbcQGoLgCAAAAADgXNa9yizMAQAAAAAAAAAAEAAAAJVnvBLmO2tAvnnO05rhRy8=</t:Value>
              </t:ExtendedProperty>
              <t:UID>040000008200E00074C5B7101A82E00800000000E05CD6BDCA2CCC010000000000000000100000009567BC12E63B6B40BE79CED39AE1472F</t:UID>
              <t:Start>2011-06-20T13:00:00Z</t:Start>
              <t:End>2011-06-20T13:30:00Z</t:End>
              <t:IsAllDayEvent>false</t:IsAllDayEvent>
              <t:Location>R3, 2.30</t:Location>
              <t:IsCancelled>false</t:IsCancelled>
              <t:CalendarItemType>Single</t:CalendarItemType>
              <t:MyResponseType>NoResponseReceived</t:MyResponseType>
              <t:Organizer>
                <t:Mailbox>
                  <t:Name>ZZZZ </t:Name>
                  <t:EmailAddress>xxx@yyyy</t:EmailAddress>
                  <t:RoutingType>SMTP</t:RoutingType>
                </t:Mailbox>
              </t:Organizer>
              <t:RequiredAttendees>
                <t:Attendee>
                  <t:Mailbox>
                    <t:Name>ZZZZ</t:Name>
                    <t:EmailAddress>xxxx@yyyy</t:EmailAddress>
                    <t:RoutingType>SMTP</t:RoutingType>
                  </t:Mailbox>
                  <t:ResponseType>Unknown</t:ResponseType>
                </t:Attendee>
                <t:Attendee>
                  <t:Mailbox>
                    <t:Name>ZYZYZY</t:Name>
                    <t:EmailAddress>xxxx@yyyy</t:EmailAddress>
                    <t:RoutingType>SMTP</t:RoutingType>
                  </t:Mailbox>
                  <t:ResponseType>Unknown</t:ResponseType>
                </t:Attendee>
              </t:RequiredAttendees>
            </t:MeetingRequest>

d97d7c84-9aa8-4874-bb76-efcb5519ff54/STFC Exchange: getItemReply

d97d7c84-9aa8-4874-bb76-efcb5519ff54/STFC Exchange: modifyItem

d97d7c84-9aa8-4874-bb76-efcb5519ff54/STFC Exchange: PS: NEEDS-ACTION

[calAlarmService] considering alarm for item: Office accommodation discussion alarm time: 2011/06/20 12:45:00 UTC isDate=0 snooze time: null
[calAlarmService] now is 2011/07/02 12:50:14 UTC isDate=0
[calAlarmService] last ack was: 2011/07/02 12:50:13 UTC isDate=0
[calAlarmService] Office accommodation discussion - alarm previously ackd.
d97d7c84-9aa8-4874-bb76-efcb5519ff54/STFC Exchange: modifyItem

d97d7c84-9aa8-4874-bb76-efcb5519ff54/STFC Exchange: PS: NEEDS-ACTION