When users are in a remote office connected via a Sonnet connection, they are unable copy files which are digitally signed to prevent the modification of macros. The issue happens whether they are making a copy to the same location or copying it to a new location. If the users go to the main office, they do not have a problem. What would be the cause of this issue?

I don't know the method of signing you are using, certs, or local id's, but on the surface if people are external to the network, I would hazard a guess that the clients cannot resolve the cert issuer to validate the cert.:P Advice offered, If you need more help it is advised to seek the council and advice of paid professionals. The answer is always 42, or reboot.

Hi Stephen Rankin, I agree with Jason, it could be casued by certificate issue. How did you sign the file? Regards, Miya TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tnmff@microsoft.comThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Thank you for the suggestions. We connected a Linux machine on one end and sent the file via FTP to a Unix NAS and still failed. At this point, it looks to be the network side.

Glad you narrow down the issue. I suggest you use some network monitoring tools to find if there's any clue. Regards, Miya TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tnmff@microsoft.comThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.