Lync Meeting Content Retention Period

When users upload documents to their meetings that are hosted by Lync, the files are uploaded to the Lync File store. One question that seems to come up a lot when designing Lync solutions is “how long is meeting content stored for?”
The files remain on the file store until they are deleted by the meeting organizer or they are removed by Lync at the default time period of 15 days (after the meeting). The default time period is configurable and can be set to any value between 30 minutes (00:30:00) and 180 days (180.00:00:00).

To view the current setting, open the Lync Management Shell and view the ContentGracePeriod attribute using this command: Get-CsConferencingConfiguration

To change the value, use this command: Set-CsConferencingConfiguration -ContentGracePeriod <value>