How to clear the Modified Retention Time using GroupWise timestamp utility

Users cannot purge email even though retention timestamp has been set
Users are unable to delete messages or empty trash
Retention not working properly

The GroupWise Timestamp Tool:
/opt/novell/groupwise/agents/bin/gwtmstmp

To clear the Modified Retention Time, add the -mn and -c flags:
./gwtmstmp -p <pathPO> -u <userID> -c -mn

To set the Modified Retention Time:
./gwtmstmp -p <pathPO> -u <userID> --set

TID 7005274 - Users cannot purge email even though retention timestamp has been set

See GroupWise Linux Executables - gwtmstmp
See How Message Retention Works from Novell GroupWise documentation.

For more information regarding specific retention flags, please see the following:
TID 7010278 - Users are unable to delete messages or empty trash.