If the issue still persists, uninstall and reinstall Skype for Mac using this link here. Click Ctrl and the trash icon, and select Empty Trash. Move all of the results returned to the trash. Open Finder and search for “Skype” using the search feature in Mac. These steps usually take 10-15 minutes to do.
You get the Skype for Business download from the Microsoft 365 portal, and then install it on your computer.
