Question Digital Signature Lost when copying across network

[AccessDave]

Hi

I have an access 2003 database with about 100 users.

I just completed an upgrade which requires my users to update their MDE file, however when some of my users copy across the MDE file for the first time and open the database, they get an error saying the database cannot be opened as there is no Digital Signature.

However, copying across the file for the second time gets rid of the error.

So it seems the Digital Signature is lost sometimes when copying the MDE file across the network.

Does anyone know why this may be happening?

Many Thanks

Dave