I have a status field with 2 options either In Progress or Signed off. I would like a formula which calculates if a document is still In Progress after 28 days, then the user should be presented with a message, and should be presented with a message every 28 days until the Status = Signed Off.
Sounds like you need a scheduled agent. The agent can run against all documents whose ( progressStatus ? Today > 28 ) or some variation of that. I would suggest using LotusScript and creating NotesDateTime objects from the field that determines the Status Date and also create a NotesDateTime object from the Today function. Having these object will allow you to compare them arithmetically. Then you can simply create a new document, give it the appropriate fields, like FORM="memo", SUBJECT="The subject of the memo", BODY="The body of the memo". Then you can send it using the NotesDocument.Send(false,recipients) method.
This was first published in November 2001