i need to automatically record when client start meet so need to record all sharing and a\v and instance message without user click on record bottom

you can think about archive option for always recording.

Hi,

For Archiving option,

The following types of content can be archived:

• Peer-to-peer instant messages

• Conferences (meetings), which are multiparty instant messages

• Conference content, including uploaded content (for example, handouts) and event-related content (for example, joining, leaving, uploading sharing, and changes in visibility)

• Whiteboards and polls shared during a conference

The following types of content are not archived:

• Peer-to-peer file transfers

• Audio/video for peer-to-peer instant messages and conferences

• Desktop and application sharing for peer-to-peer instant messages and conferences

You may need to custom your own Lync client, you can post the question on MSDN Lync SDK forum. Thank you for your understanding.

http://social.msdn.microsoft.com/Forums/en-US/communicatorsdk/threads

Best Regards,
Eason Huang