I got an issue yesterday related to sharing and the Append To right.
Usually, it takes always an extra time to remember exactly what the difference is between Append and Append to, the trick part being to remember that you Append something and you Append it To something else, here's a link to a nice chart about it.
But the issue is that we wanted to use the Append To right in a sharing situation; nothing complex at first sight but see the following screenshot
There's an Append right but no Append To.
My first idea was that Append to right on sharing was not supported but a quick look in the SDK shown that the GrantAccessRequest uses the standard AccessMask and thus supports the AppendTo Right. Here's a code snippet directly from the SDK.
GrantAccessRequest grantAccessRequest = new GrantAccessRequest
PrincipalAccess = new PrincipalAccess
Principal = new EntityReference(Team.EntityLogicalName, _teamId),
AccessMask = AccessRights.ReadAccess | AccessRights.AppendToAccess
Target = new EntityReference(Queue.EntityLogicalName, _queueId)
So, why not display it in the sharing window abut only display the Append right ?
It is definitely a 'By Design' feature but quite a bit misleading as the cumulative right is only named 'Append' in the window. If anyone would point me on the business reason for this, it would be most helpfull.
Anyway, for this particular issue the solution was to implement a custom workflow activity to handle the sharing of only the AppendTo right, the drawback being that it's not displayed in the standard sharing window; we may end up custom coding a specific screen or report just for this.