Hi Phi,
I understand the issues as following:
1, Two admin encounter the “Access Denied” error when attempting to access Manage Team Sites from Admin page, they also encounter error when attempting to access team site; The site owner can access the team site.
2, All admin can’t access the libraries with special permission.
If I misunderstood anything, please let me know.
Please refer to the following steps to try resolve the issue:
1, Login to your team site with the site owner account.
2, Click Site Actions, click Site Settings, click Site Permissions under Users and Permissions;
3, Click Check Permissions on the ribbon;
4, Input one of your admin’s display name, click the Check Names icon (beside the box), after that, click Check Now;
Do this for the other two admins, if possible, capture the result and post them in this thread.
5, Click Close, click Owners in the page; Please capture the displaying and post it in this thread.
6, Note if there is a “Company Administrator” user in the Owners Group; If not, click New, input “Company Administrator” , click Check Names; click OK.
For the inaccessible libraries, you can try the following steps to grant access:
1, Login to your team site with your initial global administrator account.
2, Click the library name on the quick navigation, if any error occur, please capture the error message and post it back.
3, If you can access the library, click Library panel, select Library permissions, add “Company administrator” to the “Owners” group.
Thanks for your continued patience with this issue, any updates, please feel free to post.
Thanks,
Evan Zhang