As you should be aware, Skype for Business Online is being retired on July 31 2021.
If you are still using Skype for Business Online and don’t have yet started your migration, now is a good time before it is too late.
Good news if Microsoft is thinking about you and help you to keep up
If you are still using Skype for Business Online, you should have a message (MC257485) in the Office 365 admin portal Message Center letting you know when your tenant will be migrated to Teams.
If you think you will not be ready, you can request a one time 3 months service extension by accessing the Teams administration portal (https://admin.teams.microsoft.com/) where you will see in the Dashboard a count down to your Teams upgrade with the option to request the extension