Can't Move Calendar/Tasks Items from Primary Mailbox to Archive

[bwlonsdaledxc]

Same issue as happened earlier in the year - will raise a MS Ticket for it also. ErrorMoveCopy when moving items from Calendar/Tasks folder into Archive.

I've realised while working on this issue that this is causing multiple copies of Calendar/Task items to be created in the Archive folder because it can't remove the original. Every time we run the script it just creates a new copy of the item in the archive.