Skype meeting add-in not getting enabled in Outlook after a restart

Solution to issue:

1. Exit Outlook if it is running.
2. Press the Windows function key, search for "regedit," and then click OK.
3. In Registry Editor, locate the following subkey:
   
   HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\UcAddin.LyncAddin.1
4. In the details pane, double-click LoadBehavior. If the value in the Value data box is not 3, change it to 3 and then click OK.
5. Exit Registry Editor.
6. Start Outlook.

How to delete a Skype contact from Skype for Business Contacts folder

If you are unable to delete a Skype contact from Skype Client
Then you can delete the contact by following below procedure

-          Exit from Skype Client & Outlook

-          Login to OWA

-          From Contacts folder, you can select and remove the particular contact whom the user want to delete