When you tried to move your email from mailbox to your PST (personal folder) and found this error “Cannot move the items. You don’t have appropriate permission to perform this operation.”
To fix Cannot move the items, please do the following, it will need admin right, if you cannot do below, ask your administrator to do it
1. Open registry
Before edit any registry key, you must make a backup first. Fail to do so can cause your computer not working properly.
2. Find for pstdisablegrow
3. Change REG_DWORD from 1 to 0
edit the value from 1 to 0
4. Restart outlook
Restart outlook to make it work
If you are using outlook 2010 then change on office 14.0
If you are using office 2013/365 then change on office 15.0
Close the outlook and restart, it should works now.
Refer to this for more : https://social.technet.microsoft.com/Forums/office/en-US/2b70b52c-4a2f-4341-96b9-2a004494a59c/cannot-move-the-items-you-dont-have-appropriate-permission-to-perform-this-operation?forum=outlook