You can store copies of your Skype for Business/Lync chat conversations to refer to later.

To turn on the option for storing chat history:

  1. Open Skype for Business/Lync and sign in. 
  2. Click Show Menu arrow next to the gear icon in the top right and select Tools > Options > Personal.

    Options
  3. On the Personal tab, choose Microsoft Exchange or Microsoft Outlook from drop-down menu and select Save my IM conversations in my email Conversation History folder. Click OK.

    Save Conversation History
  4. Sign out of Skype for Business/Lync (choose drop-down menu next to Availability Status > Sign Out), then sign back in to apply changes.
  5. All future chats will be saved in the Conversation History folder. You can open this folder in Outlook or OWA. 

Note: this option is only supported if you are using Outlook as the main email client.