Hi, @sns ,
I want to confirm some detailed information with you. You mentioned that the issue lies on lists and libraries only. Do you mean that all the libraries and lists will return access denied error when the user tries to visit? And is he the only one who has this issue? Does similar behavior observed in other site collections with this user?
Here are two ways you can try:
- Goes to the user information list, remove the user with issue, then try to access the site again.
- Check the site collection feature, make sure you have de-activate the Limited-access user permission lockdown mode feature.
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