If you try to pickup files with the standard Biztalk File Adapter, you will receive these two errors in the eventlog (and the Receive Location will disable) – even if you have givet it MODIFY access to the folder.
The Messaging Engine failed to add a receive location "RL_Test_EDIFACT" with URL "C:\FileDrop\Test\EDIFACT\*.edi" to the adapter "FILE". Reason: "File transport does not have read/write privileges for receive location "C:\FileDrop\Test\EDIFACT\". ".
followed by
The receive location "RL_Test_EDIFACT" with URL "C:\FileDrop\Test\EDIFACT\*.edi" is shutting down. Details:"The Messaging Engine failed while notifying an adapter of its configuration. ".
That is because the Biztalk File Adapter expects “Full Control” on the folders it reads from, but if that is not possible, you can also just add a single extra permission
https://social.technet.microsoft.com/wiki/contents/articles/7008.biztalk-file-adapter-permission-issue-workaround.aspx
Apart from MODIFY access, add the “Delete Sub Folders and Files” Advanced permission to enable the Biztalk File Adapter to read files
Required NTFS permissions for BizTalk File Adapter connecting to network share
What permissions are required? storage?
The extra required permissions are listed in the post
Apart from the obvious “Modify” access, a Biztalk receive location also requires the “Delete Sub Folders and Files” Advanced permission