@Eliza ,
You could follow the steps to hide the offline time or days in Skype for Business client:
- Enable business-to-business communications for your users.
- Click on the Relationship Tab from the main Skype for Business Window.
- Under Relationship Tab, you will see several groups. Friends and Family, Colleagues, External Contacts, Blocked Contacts, etc.
- Now, decide on which contacts you want to hide your Away and Offline times from. Drag and drop those contacts under the External Contacts area.
- After the contacts under External Contacts area relog in clients, it will take effect.
Please note that External Contacts will also have limited access to many other information about you.
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