1.) You need to enable Optional Connected Experiences to allow Giphys in conversations.
If your admin has given you the ability to use optional connected experiences in Teams, you can go to Settings > Privacy in Teams and choose whether you want to use optional connected experiences.
2.) Clear cache for New Teams
Method 2: Delete the files
- If Teams is still running, right-click the Teams icon on the taskbar, and then select Quit.
- Open the Run dialog box by pressing the Windows logo key
+R.
- In the Run dialog box, enter the following path, and then select OK.
ConsoleCopy
%userprofile%\appdata\local\Packages\MSTeams_8wekyb3d8bbwe\LocalCache\Microsoft\MSTeams
- Delete all files and folders in the directory.
- Restart Teams.