According to the latest MS documentationLync (I assume it's the same for this case of lync 2013) will Display on the tab:
- All Shows your 100 most recent conversations
- Missed Shows any missed conversation during that timeframe (100 most recent)
- Calls Shows your 100 most recent calls
But when i look I can find up to 70~75 records in all and 20~30 in the call history.
Has someone have any more Details about this calculations how lync gets this maximum number?