In Teams chat, I received a file but it says "You need permission to access this item" and I cannot open it.

Q. In Teams chat, I received a file that shows "You need permission to access this item". Even after requesting access, I still cannot open it. How should I handle this?

A. The file sender should delete outdated user information that cannot be accessed from OneDrive’s "Users and Groups", and then resend the file.

If you return to work after more than 91 days following resignation, the same THERS account as before will be issued. Although it looks the same, it is actually a newly re‑created THERS account.

Reference: THERS Account Upon Reemployment More Than 91 Days After Departure.

It appears that re‑created THERS accounts may experience an issue where files received after reinstatement cannot be accessed if they were previously received from the same user before leaving.

【How to remove a user from OneDrive's "People and Groups"】

Please ask the file sender to perform the operation.

1.  Access OneDrive and open any file.
2.  In the address bar, replace "/_layouts/15/..." with "/_layouts/15/people.aspx?MembershipGroupId=0" and press Enter.

https://thersacjp-y.sharepoint.com/:p:/r/personal/***********_f_thers_ac_jp/_layouts/15/Doc.aspx?sourcedoc=%7B783675F9-31B....

https://thersacjp-y.sharepoint.com/:p:/r/personal/***********_f_thers_ac_jp/_layouts/15/people.aspx?MembershipGroupId=0

3. The "People and Groups" ▸ "All People" screen will appear.

4.  Select the user(s) that cannot be accessed from the list, then click "Action" > "Delete Users from site collection" to remove them.

   

5.  Please resend the inaccessible file to the target user.

Reference: Remove people from the UserInfo list