Set My Picture options in Skype for Business - Microsoft Support

The My Picture options window in Skype for Business is where you can change your sign-in settings to speed up the sign-in process, specify presence and calendar meeting information to display to others in Skype for Business, and tell Skype for Business how you want it to interact with other Office programs.

Important: If the Edit or Remove Picture button on the My Picture options window is dimmed (not available), your organization has turned off the option that allows users to change their picture settings. See your technical support staff if you have questions about this policy.

Here’s how to access the My Picture options window:

In the Skype for Business main window, click the Options button and select My Picture, or click the arrow next to the Options button and select Tools > Options.
On the Options page, select My Picture.

Note: If you’ve selected Show Menu Bar, you can open the options menu from the Skype for Business main window by clicking Tools > Options and then selecting My Picture.