I just learned this:
Set an expiration date for a restricted file
Authors can use the Set Permissions dialog box to set expiration dates for content. For example, Ranjit might also decide to limit both Helena's and Bobby's access to this document to May 25th, and then the permission to the document expires.
On the Review tab, under Protection, click Permissions, and then click Restricted Access.
From MS documentation on-line.
I just had a document expire. It was sent to me by a friend. He did not tell me it would shut like a clam. I can not even delete it.
Any way I can open it? Delete it? Move it?