Are you a MAC user? Do you also happen to use Skype for communication? Are you trying to create a Skype meeting from Outlook and getting an error? Is the message “To create the online meeting, sign in to Skype for Business (Lync) and try again” ?
Well there is a simple fix for this.:
On the MAC desktop go to Security & Privacy –> Privacy –>Automation. In the Automation box should have some apps listed. If you scroll down to the SFB app it should have Outlook underneath it. Make sure that box is checked. You may also want to log out of Skype and Outlook and back in and test. This should now be resolved.