If two users are simultaneously modifying the same record in the same
table, the user who tries to save the record last receives the
following message:
This record has been changed by another user since you started
editing it. If you save the record, you will overwrite the changes
the other user made.
Copying the changes to the Clipboard will let you look at the values the
other user entered, and then paste your changes back in if you decide to
make changes.
However, if the second user copies the changes to the Clipboard and then
decides to paste in changes, the
Paste command is unavailable in Microsoft Access.