Locating documents and sharing them with others within Microsoft Teams channels or chats
Hi Matt, hope you're doing well. I’m Ian, and I’m happy to help you today.
Are you a guest in this organization?
Are you able to access this share files before?
If yes, I suggest to clear your Teams desktop app cache:
- Sign out on Teams > Quit Microsoft Teams by right clicking the icon and select Quit.
- On your keyboard, Hold Windows key and Press R
- Cut and paste %appdata%\Microsoft\Teams in the RUN then OK.
- Delete the contents of the entire folder.
- Restart Microsoft Teams > Sign In.
https://learn.microsoft.com/microsoftteams/trou...
This is a user-to-user support forum and I am a fellow user.
I hope this helps, but please let me know if you need anything else.